History Characters / ThomasTheTankEngineTheDiesels

[[WMG:[[center: [-''WesternAnimation/ThomasTheTankEngine'' [[Characters/ThomasTheTankEngine character index]]\\
[[Characters/ThomasTheTankEngineTheSteamTeam The Steam Team]] | '''The Diesels''' | [[Characters/ThomasTheTankEngineLittleWesternAndArlesdale Little Western and Arlesdale]] | [[Characters/ThomasTheTankEngineSkarloeyRailway Skarloey Railway]] | [[Characters/ThomasTheTankEngineForeignEngines Foreign Engines]] | [[Characters/ThomasTheTankEngineSecondaryCharacters Secondary Characters]] | [[Characters/ThomasTheTankEngineNonRailCharacters Non-Rail Characters]] | [[Characters/ThomasTheTankEngineRollingStock Rolling Stock]] | [[Characters/ThomasTheTankEngineHumans Humans]] ]]]] -]
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[[folder:Diesel]]

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/disappearingdiesels99.png]]
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--> "Your worthy Sir Topham Hatt thinks I need to learn. He is mistaken. We diesels don't need to learn, we know everything. We come to a yard and improve it. We are revolutionary!"

-->Voiced by: Michael Brandon (US; Seasons 13-16), Creator/MartinSherman (US; King of the Railway - Season 18), Kerry Shale (UK; Season 13 - present US; Season 19 - 24)

--> Basis: British Railways Class 08 0-6-0DM

--> Built: 1952

The first diesel to visit the Island of Sodor, Diesel believes that diesels are better than steam engines, and wanted to "revolutionize" Sodor. He left and came back several times before becoming a permanent part of the railway.

* AdaptationalVillainy: In the books, Diesel was merely a pompous bully, and, after one return to Sodor, managed to redeem himself. In the series, he returned permanently, though proved as nasty as ever, and gleefully bent on [[FantasticRacism having all steamies sent to the scrapyard]]. He tamed closer to the books' version in the [=HiT=] seasons.
* AdaptationalHeroism: In the reboot ''All Engines Go'', Diesel was retooled as one of Thomas' close friends.
* AesopAmnesia: No matter how many times he learns about being nice to other engines, he'll soon return to his bullying ways.
* AlliterativeName: His name in the marketing, '''D'''evious '''D'''iesel.
* AntiHero [=/=] AntiVillain: In rare instances, he's portrayed as an engine that ''wants'' to do good work and be recognized for his talents, but doesn't know the right way to do so and ends up hurting or upsetting others.
* ArchEnemy: Though antagonistic to almost everyone, he seems to direct most of his enmity and rivalry towards Thomas in the HIT seasons. His main enemy in his initial appearances was Duck.
* ArcVillain: Of the three-episode arc with Duck as the main protagonist: "Pop Goes the Diesel", "Dirty Work", and "A Close Shave", though he doesn't appear in the last one.
* AscendedExtra: He appeared in one novel of ''Literature/TheRailwaySeries'' and a standalone story by Christopher Awdry. In the show (especially in later HIT seasons), he makes regular appearances and is a key antagonist.
* AttackHello: At least in "Springtime for Diesel", his way of saying "hello" is by deliberately bumping into other engines.
* BitchInSheepsClothing: He isn't above pretending to be a NiceGuy, especially when he's in the [[ManipulativeBastard manipulative]] mood. In his debut episode "Pop Goes the Diesel" for instance, he effortlessly charms the other engines into believing he's a NiceGuy. He soon then reveals his true colours, though.
* TheBully: What he becomes in the new series. He gets enjoyment of heckling and harassing other engines, especially steam engines.
* CardCarryingJerkass: HiddenHeartOfGold and PetTheDog moments aside, Diesel proudly admits in "Diesel and the Ducklings" that he's a {{Jerkass}}.
* CardCarryingVillain: He admits he's a bad engine during "[[VillainSong I'm Full of Surprises]]" and once stated [[MeaningfulName there's a reason]] he's called [[AlliterativeName Devious Diesel]].
* DarkMessiah: In his first episode, he comes to Sodor preaching the diesel revolution.
** Touched on lightly again in "Blue Mountain Mystery" where after hearing of Luke's DarkAndTroubledPast, he convinces Paxton he is dangerous and must be gotten rid of.
* DevilInPlainSight: He's the most ObviouslyEvil character among the recurring cast, is willing to ruin jobs for glory or petty revenge, and any hint of possible reformation is gone by the next episode, yet he's still is allowed to live and work on the railway.
* DisproportionateRetribution: When not picking on engines [[ItAmusedMe for mean laughs]], he's often committing this. As he lampshades in "Springtime For Diesel" the steam engines aren't particularly nice to him either, but what meanness they can give he can surpass ten fold. The most iconic being in his first appearance where, after Duck let him humiliate himself for being a pompous kiss-ass, Diesel spread MaliciousSlander to try and get him booted off the railway.
* DoesNotKnowHowToSayThanks: In "Disappearing Diesels". He settles for a [[TheUnSmile friendly smile]] instead.
* ADogNamedDog: A diesel named Diesel.
* EstablishingCharacterMoment: In his introductory episode, in which after smoothly flattering all the other engines, he says the above quote to Duck about how diesels "don't need to learn" and are "revolutionary".
* EvenEvilHasStandards: Diesel is no saint himself, but even he was repulsed in "Blue Mountain Mystery" after he learnt that [[spoiler: Luke seemingly killed another engine]].
* EvilBrit: In later seasons of the U.S. dub, Diesel speaks in a bit of a [[UsefulNotes/BritishAccents Cockney accent]]. There's also a good reason they call him devious.
* EvilCounterpart: He's just as iconic as Thomas in the show, but for all the wrong reasons and sees the blue tank engine as his ArchEnemy.
* EvilCannotComprehendGood: He couldn't understand why Paxton would help him after one of his pranks, nor could he comprehend Daisy and Harvey's OddFriendship (Which [[{{Irony}} he himself instigated]])
* EvilIsPetty: He's fond of [[KickTheDog dog-kicking]] and {{Disproportionate Retribution}}s, never mind his FantasticRacism. However, Diesel can [[PragmaticVillainy restrain himself]], at least when the Fat Controller is nearby.
* EvilWearsBlack: He has black paint and is one of the most malicious characters in the series.
* FantasticRacism: Not initially, but after the Classic series, it's made clear Diesel thinks lowly of steam engines.
* {{Flanderization}}: Diesel saw diesels as revolutionary originally, but it was not his main vendetta against the steam engines, and he was rather shrewd and manipulative in his antics. Shortly into the TV made episodes however, Diesel became a more outspoken bully and exaggeratedly racist towards steamies. The current episodes seem to be toning him back down, even if he is still a much more obnoxious heckler than initially.
* FreudianExcuse: He discusses it in "Springtime for Diesel", saying how he doesn't feel that he should be nice to engines who aren't nice to him; evidently, on some level he's very well aware of how unfriendly he is, but is hurt by the fact that the other engines don't give him a chance to redeem himself, so he continues being mean [[ThenLetMeBeEvil since that's apparently what they expect of him]].
* FreudianExcuseIsNoExcuse: What was [[spoiler: Daisy]]'s response to learning about Diesel's FreudianExcuse? NoSympathy.
* GutturalGrowler: When voiced by Michael Brandon and Martin Sherman, Diesel has a gruff-sounding voice.
* TheHeckler: Sure to be found making fun of whatever the spotlighted engine is doing, often triggering their insecurities.
* HiddenHeartOfGold: Played with in "Diesel and the Ducklings". He thinks that diesels should be rough and tough, but shows his soft side towards some ducklings.
* ItsAllAboutMe: He often chooses to do things based on his own selfish desires, while ignoring how his fellow engines will be affected by it.
* JerkWithAHeartOfGold: Heavy on the "Jerk" part as he's a rude, [[ManipulativeBastard manipulative]], [[ItsAllAboutMe selfish]], and devious FantasticRacist. Still, he tends to get a [[PetTheDog softer moment]] roughly OnceASeason (e.g. "Diesel's Special Delivery", and in the Arc-animated episodes "Diesel and the Ducklings" and "Springtime for Diesel") and he shows VillainRespect when he feels like it. It's also implied in "Disappearing Diesels" that he simply doesn't know how to be nice, even if he tries.
* JokerImmunity: A G-rated example. In contrast to his ''Railway Series'' counterpart (who was sent packing the moment the Fat Controller could deduce he was the one spreading lies in the yard), Diesel is never sent away again or receives any severe punishment, despite all of the trouble he causes with no sign of reformation.
* KarmaHoudini: A PlayedWith one. Diesel usually gets hit with LaserGuidedKarma whenever he does something bad. However, he's still allowed on Sodor despite his terrible track record (and having been sent away multiple times).
* KickTheSonOfABitch: Sometimes Diesel's heckling is directed towards haughty engines or even ones that bite first. FantasticRacism is a prominent issue among many steamies and diesels, Diesel's just one of the worst cases.
* KindnessBall: In "Diesel's Special Delivery", he's inexplicably nice and doesn't brag about his superiority over steam engines.
* ManipulativeBastard: Renowned for this, most infamously in his debut, he tells jokes about the big engines to the trucks, and tells them that Duck shared them with him. Once the trucks starts laughing at the other engines, they're convinced Duck had been spreading nasty jokes about them. Despite being found out and punished, he still somehow manages to smooth talk engines into trusting him (eg. convincing a lonely Percy into helping the Dieselworks in "Day Of The Diesels", or sweet talking Mavis into doing odd jobs in "Thomas The Quarry Engine"). He notes the other engines distrust of newcomer Sonny, and manipulates him into doing his jobs as he pretends to be friendly with the new engine.
* MeaningfulName: [[AlliterativeName Devious Diesel]], befitting of his conniving persona.
* MyGodWhatHaveIDone: Diesel has experienced this several times. For example, [[spoiler: he is sincerely remorseful when he thinks he damaged Daisy beyond repair after giving her a teasing biff in "Springtime For Diesel"]].
* MythologyGag: Though the TV series never adapted ''Thomas and the Evil Diesel'' proper, the premise of Diesel becoming an occasional FriendlyEnemy to Thomas got used recurrently from the HIT era onwards.
* NeverMyFault: [[CantTakeCriticism Hates being reprimanded for his mistakes]], and will always find a way to shift the blame onto other engines. This gets especially bad in season 23's "Diesel Do Right" where after he's punished by the Fat Controller for not doing his job correctly, rather than own up to his failure and work harder, he decides to trick Rebecca into doing the other diesels' jobs wrong.
* ObviouslyEvil: In the Mitton directed seasons anyway. While the books left it more imagination, the show version's devious smile, sinister Leitmotif and shady voice over from the narrator leave little doubt from the first time he's shown that he probably isn't a NiceGuy.
* OffscreenKarma: In "A Close Shave" where the Fat Controller found out about his lies about Duck telling names about the other engines and sent him away to the other railway. Averted in "Diesel Does It Again" and most later episodes where Diesel is seen getting his comeuppance for causing trouble.
* OutOfCharacterMoment: "Diesel's Special Delivery", in which Diesel broods over not getting clapped and cheered by children as much as James does.
* PetTheDog: One episode per season, before he snaps back into his usual devious and abrasive personality.
* PsychoticSmirk: His default expression whenever he's up to no good. He's even doing it in one of the above pictures.
* RedAndBlackAndEvilAllOver: He's got red buffers, [[EvilWearsBlack black paint]], and a malicious nature.
* RedBaron: In promotional material, he is often referred to as "Devious Diesel". Within the show itself, this nickname is rare, but not completely unheard of.
* ShipTease: He has some with Daisy in season 21. In "Springtime for Diesel", he feels guilty about bumping her and admits that he likes her while she's (pretending to be) asleep at the Dieselworks, and made a genuine effort to become her friend. At one point in "A Most Singular Engine", he blushes as he says her name.
* SmallNameBigEgo: He's extremely egotistical, cocky and strongly believes that the diesels are far superior than the steam engines.
* SmugSnake: Especially in later CGI episodes. While Diesel is a fine schemer and ManipulativeBastard, he is quite cocky and not as clever as he thinks he is. The original version of the song "Troublesome Trucks" even indirectly calls him out on the latter. Special note goes to [[spoiler: "Diesel Glows Away" in which he underestimates Nia's intellect. Also, she and Paxton trick him into falling for his very own trick (although he at least later deduced that they tricked him)]].
* TeamRocketWins: Sometimes gets to pull specials and look splendid at last. "Diesel's Special Delivery" for example. [[spoiler: "The Railcar and the Coaches" also ends with him temporarily taking over Thomas' branch line after Annie and Clarabel trick Daisy]].
* ThenLetMeBeEvil: In a few cases, including his first appearance, Diesel will make a halfway attempt to be friendly and helpful, but either his bad reputation or oily manner of doing so will lead him to get brushed off, and him to usually revert back to his old nasty habits in retaliation. As he sulks in "Springtime For Diesel" he doesn't feel the need to be nice when he doesn't feel anyone is nice to ''him''.
* UngratefulBastard: When Duck [[BigShutUp stands up for Diesel]] when the trucks were [[TheVillainSucksSong singing a rude song]], he blames Duck for, ahem, 'making the trucks laugh at him'.
* VillainousBreakdown: While they vary in intensity, Diesel is prone to losing his cool whenever his plots fail.
* VillainRespect: He occasionally displays some begrudged respect for some engines, like [[ArchEnemy Thomas]].
* VisionaryVillain: Started off as one, with it returning every now and then.
--> '''Diesel:''' "Your worthy Sir Topham Hatt thinks I need to learn. He is mistaken. We diesels don't need to learn, we know everything. We come to a yard and improve it. We are revolutionary!"
[[/folder]]

[[folder:[=BoCo=]]]

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/mainbocomodel.png]]

--> "Stop! You're making me giddy!"

--> Number: D2, Originally D5702

--> Basis: British Railways Class 28 Co-Bo

--> Built: 1958

A Metropolitan-Vickers diesel who works on Edward's station. Was initially referred as "The Diseasel" by Bill and Ben and was the subject of their tricks until Edward soon put a stop to their games.

* ChuckCunninghamSyndrome: In the television series, his last appearance was in Season 5's "Double Teething Troubles". He has made cameos in various Thomas Creator Collective videos since.
* DarkIsNotEvil: Bill and Ben thought he was a trouble-making diesel stealing their china clay trucks until he explained he had mistakenly took them and didn't know it was theirs.
* FlatCharacter: He's essentially just a diesel version of Edward.
* MeaningfulName: His name comes from his wheel configuration, Co-Bo.
* NiceGuy: He is once of the nicest diesels.
* ReusedCharacterDesign: His faceplates are the same as Daisy, sans eyelashes and makeup.
* TeamDad: To Bill and Ben.
* YoungerThanTheyLook: Despite keeping Bill and Ben in order. He is in fact 10 years younger than the twins.
[[/folder]]

[[folder:Mavis]]

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/denanddart36.png]]
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--> "If we use the teensiest bit of Toby's line, we can save all this bother."

-->Voiced by: Teresa Gallagher (UK; Hero of the Rails - present, US; Season 17 - present), Jules de Jongh (US; Hero of the Rails - Blue Mountain Mystery)

--> Number: Fharquay Quarry 1

--> Basis: British Railways Class 04 0-6-0DM

--> Built: 1962

A feisty diesel that works at the quarry. She started off as a cheeky young engine who thought she knew what was right, but matured into a kinder and more motherly engine over time.

* AscendedExtra: Only got a few stories to herself in the books, but has plenty of focus in the television series.
** She ends up playing an important role in ''WesternAnimation/HeroOfTheRails''. In an effort to prevent Spencer from finding out about Hiro, Thomas and Percy send him to the quarry and Mavis guides him to back up right underneath the operating slate hopper so he had to be taken for repairs at the Steamworks.
* CharacterDevelopment: She became more of a NiceGirl in season 6.
* TheConfidant: Plays this role to Salty in "Salty's Secret", where he tells her about how he feels he isn't fit to work at the quarry and longs for the sea.
* JerkWithAHeartOfGold: Started off as this in her debut season.
* MouthyKid: Started off arrogant and refused to follow Toby's orders. She tamed after her re-innovations to how things worked caused serious problems.
* NiceGirl: She eventually became this. She's also one of the most kind-hearted diesels.
* ShipTease: With Salty in his debut episode. Unlike Bill and Ben, she treated him with kindness, and served TheConfidant to him regarding his desire to be at sea.
* TheSmurfettePrinciple: Until the movie, she and Daisy were the only female engines, neither of whom appeared very often.
* TeamMom: Was this occasionally with Bill and Ben, but now plays this role with most other engines.
* {{Tomboy}}: Compared to the other female engines, she's not feminine at all. In fact, the only feminine things about her appearance are her cowcatchers and sideplates, which kind of resemble a skirt or a dress.
* TookALevelInKindness: The show mellowed her out significantly so she is often the prime WhiteSheep of the diesel ensemble.
* WhiteSheep: She is easily the most kind-hearted diesel on the show currently.
* YoungerThanTheyLook: Compared to her later TeamMom persona. Especially noticeable in the Japanese dub, where she has a rather high pitched and childlike voice.
[[/folder]]

[[folder:'Arry and Bert]]

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--> "Got you this time, Stepney. You'll make very fine scrap indeed. Buffer 'im, Bert!"

-->Voiced by: Kerry Shale ('Arry, Season 14-present; Bert, Seasons 14-16), William Hope (Bert, Season 17-present)

--> Basis: British Railways Class 08 0-6-0DM

--> Built: 1952/1962

Also known as the Smelter Twins, 'Arry and Bert work at the scrapyards and are bullies to all steam engines. Multiple times, they have threatened and shown desire to smelt down the steam engines for good.

* AffablyEvil: Over the years they've become less evil, but remain bullies toward the steam engines.
* {{The Bull|y}}ies: Like Diesel, they are obnoxious hecklers to the steam engines.
* CoDragons: They play to role to Diesel, in the HIT Entertainment episodes anyways.
* CreepyTwins: Played this role in ''Stepney Gets Lost'', but have been toned down later on.
* DemotedToDragon: They often tend to work alongside Diesel in the Hit episodes.
* DemotedToExtra: They appeared far more sporadically following Sharon Miller's leave as head writer.
* FantasticRacism: Like Diesel, they seem to dislike steam engines, even trying to ''scrap'' Stepney.
* IdenticalTwinIDTag: Bert has stubble, while 'Arry's clean-shaven.
* {{Jerkass}}es: They're terribly rude, rough, and antagonize the engines just as much as Diesel does.
* JerkWithAHeartOfGold: They have their moments. For example, they enjoyed Diesel's ducklings in "Diesel and the Ducklings", and in "Springtime for Diesel", they seemed genuinely concerned when they heard that Daisy might have to be scrapped if she can't be repaired.
* KarmaHoudini: In their earliest appearances, they actually got away with harassing the other engines and getting them into trouble. Usually subverted in later seasons, though like Diesel, they sometimes still get a free pass for petty heckling, ([[KickTheSonOfABitch especially towards an equally obnoxious engine]]).
* PermaStubble: Bert.
* PetTheDog: They seem to at least care about fellow diesels. They are sincerely horrified when it looks like Daisy might get scrapped in "Springtime For Diesel". They also apparently share Diesel's CutenessProximity for ducklings.
* SingleMindedTwins
* SuspiciouslySimilarSubstitute: To Splatter and Dodge from ''WesternAnimation/ThomasAndTheMagicRailroad''. The latter were in fact re-paints of their original models.
* WhereItAllBegan: Their friendship with Diesel started in "Fergus Breaks The Rules", when the Fat Controller tells Fergus Diesel will be sent to work at the smelters, which is the main work station for Arry and Bert.
* VillainDecay: In "Stepney Gets Lost", they take great glee in [[spoiler:almost]] scrapping Stepney. This murderous depiction was never seen again in the series proper, which instead reduced the characters to mere bullies.
[[/folder]]

[[folder:Diesel 10]]

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/maindiesel10cgi.png]]
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/maindiesel10model.png]]


--> I can do whatever I want! I'll get him too! With Pinchy!

-->Voiced by: Neil Crone (''WesternAnimation/ThomasAndTheMagicRailroad''), Matt Wilkinson (''Day of the Diesels'' - present)

--> Basis: British Railways Class 42 'Warship'

The major antagonist of ''WesternAnimation/ThomasAndTheMagicRailroad''. A large warship diesel with a mechanical claw on his roof, he was out to destroy Lady and Mr. Conductor, but was defeated thanks to Thomas. He has returned several times in the show's run as a permanent part of the railway.

* AffablyEvil: By the time of ''Day of the Diesels'' where his evil ways are mostly put on the wayside in favor of him being [[JerkWithAHeartOfGold rude and vicious-tempered]], but [[WellIntentionedExtremist just trying to look out for his diesel brethren]].
* BadBoss: Is a mild example of this. In ''Thomas and the Magic Railroad'', he tries to put Splatter and Dodge in their places by teaching them "how to stop being stupid", only to get coal dumped all over him.
* BigBad: Diesel 10 is this in both ''WesternAnimation/ThomasAndTheMagicRailroad'' and ''WesternAnimation/DayOfTheDiesels''.
* BrooklynRage: In TheMovie, Diesel 10 speaks in a rough and angry New York accent. He also caused Lady to crash, unapologetically tries to kill James, Lady and Thomas, and he nearly dropped Mr. Conductor off a viaduct. This oddly contrasts to his much smoother EvilBrit voice in later appearances.
* TheBrute: Along with being the BigBad of at least two features, Diesel 10 is this among the diesels; being a very large and very strong Class 42 Warship locomotive with a dangerous hydraulic claw arm.
* ButtMonkey: He gets his immediate comeuppance in at least three scenes of ''Magic Railroad''; one in which his claw malfunctions, another where he gets coal dumped all over him, and finally being defeated by falling off a collapsing viaduct into a [[TrashLanding barge full of old boiler sludge]].
* CartoonCreature: While he's based on a real locomotive type, his claw is purely a fantasy creation with little to no practical use. In fact, such a modification is actually a ''breach of regulations'' since it would make him unable to fit through standard-height tunnels.
* CheatedAngle: In the model series, his nose is tilted more towards his left eye. This was averted when the CGI series came, which moved it more to the middle of his face.
* DemotedToExtra: He has disappeared from the series after season 17's "The Missing Christmas Decorations", for reasons unknown. Although, Pinchy does appear in an ImagineSpot in season 22's "What Rebecca Does", and Mattel still sees him as a lucrative character, seeing as he's merchandised to death despite not being on the show all that often.
* DependingOnTheWriter: He's either an evil, [[FantasticRacism dieselist]] brute who is out to destroy all steam engines, or simply a rude JerkWithAHeartOfGold who doesn't like "steamies" all that much but is still willing to help out when it counts; and moreso when he can get something out of it for himself, or for the other diesels.
* DevilInPlainSight: The steam engines all can tell he's clearly evil, but the Fat Controller keeps him around for reasons unknown. [[DownplayedTrope Downplayed]] in the series, where he is still a devious schemer, but his attitude leans more towards {{Jerkass}}/JerkWithAHeartOfGold than than just outright evil.
* DisneyVillainDeath: Not a death per se, but his defeat in ''Magic Railroad'' is brought around by falling off of a collapsing viaduct; though he's saved by [[TrashLanding falling into a passing barge full of boiler sludge]].
-->'''Diesel 10''': (''slowly realising he's okay'') Huh. Ah, well... nice time of year for a cruise. (''[[LaughingAtYourOwnJokes chuckles to himself mirthlessly]]'')
* ADogNamedDog: He's a diesel whose name is Diesel, but he has a number to distinguish himself from the ''other'' two Diesels. Thomas lampshades said number in ''Magic Railroad'' by describing him as "Ten out of ten for devious deeds and brutal strength".
* TheDreaded: Right from his first appearance, Diesel 10 has this reputation among the other engines. Even when his villainy is considerably toned down later on, Thomas is terrified at the prospect of asking him for help in ''Calling All Engines!'', and [[LargeAndInCharge most of the other diesel engines firmly answer to him]].
-->'''Gordon:''' (''shuddering in fear'') D-Diesel 10's back!
-->'''Thomas:''' Yes, ten out of ten for devious deeds and brutal strength. The blast from the past who hates steam engines!
* EstablishingCharacterMoment: In TheMovie, he roars through as station, kicking up dust shouting "Get outta my way! I have unfinished business here and I wanna finish it FAST!". He also leaves ''[[TheBigGuy Gordon]]'', of all engines, shaking in fear.
* EvilBrit: In the US dub of the television series, he speaks in a smooth, sinister British accent due to him keeping his voice from the UK series.
* EvilCounterpart: To P. T. Boomer in ''Thomas and the Magic Railroad'', who serves as the Shining Time counterpart of Diesel 10. However, the two are both evil.
* EvilLaugh: Has an impressive one, but it tends to be subverted due to it often ending with him getting into a coughing fit from his own diesel fumes.
* FauxAffablyEvil: Diesel 10 is firmly this in ''Thomas and the Magic Railroad'', where he often strikes up conversations in a faux-friendly tone with his would-be victims as he's attacking them. One good example of it is when he captures Mr. Conductor with Pinchy and threatens to drop him off a high viaduct if he doesn't tell him where the magic buffers are in short order:
-->'''Diesel 10:''' Hello, Twinkle Toes! Remember me? Fat Hatt won't have much use for you looking like that. (''laughs cruelly'') [[CallBack Ah, I see you forgot to bring the sugar. How]] ''[[CallBack careless]]'' [[CallBack of you!]] (''grabs Mr. Conductor as he tries to flee'') Say hello to Pinchy!
* ForTheEvulz: Dumping sneezing powder all over Tidmouth Sheds Yards has got to be this.
* GambitRoulette: His plans in ''Day of The Diesels'' rely on circumstance he could have hardly picked out.
* GracefulLoser: His reaction to falling into a barge of sludge?
-->'''Diesel 10:''' (''slowly realises he's okay'') Huh. Ah, well... nice time of year for a cruise. (''[[LaughingAtYourOwnJokes chuckles to himself sadly]]'')
* ICallItVera: He calls his hydraulic claw "Pinchy".
* JerkWithAHeartOfGold: Diesel 10's characterization in ''WesternAnimation/CallingAllEngines''. It's also evident to a lesser extent in his later appearances; he's still a bullying troublemaker who maintains his reputation as TheDreaded, but he cares a lot deep down for his diesel brethren -- whom he sees as neglected compared to the steam engines -- and [[WellIntentionedExtremist commits a good portion of what he does for their benefit]].
* LargeAndInCharge: He is the self-elected head of the diesels by ''Day of the Diesels'', and he's a large and powerful Class 42 "Warship" diesel. The hydraulic claw probably helps, too.
* LargeHam: In both TheMovie and Season 17.
* LaughablyEvil: Compared to TheMovie, he's slowly become this over time; less of a legitimately threatening villainous sociopath, and more of a troublemaker and bully who still looks out for his fellow diesels.
* AMoltenDateWithDeath: In one of his most evil moments in ''Thomas and the Magic Railroad'', Diesel 10 traps James in the smelters and nearly succeeds in shoving him backward into a vat of molten metal. He's only saved by Mr. Conductor warping him away with the Gold Dust at the ''literal'' last second.
* NeverMyFault: He tries lying to Splatter and Dodge when Mr. Conductor escapes his grasp.
* TheNicknamer: He calls Splatter and Dodge collectively "Splodge", because he "ain't got time to say both names". He calls his claw "Pinchy", Thomas "Puffball", Toby "Teapot", the rest of the steam engines "Tin Kettle", and Mr. Conductor and Sidney "Twinkle Toes".
* ObviouslyEvil: He has a menacing hydraulic claw on his roof, that he affectionately names "Pinchy".
* SilenceYouFool: When his entourage are bickering in ''Day of the Diesels'', he shouts them quiet. Also prominent in ''WesternAnimation/ThomasAndTheMagicRailroad''.
* TheStinger: Diesel 10 appears right at the end of ''Misty Island Rescue'', hinting at his reappearance as the main antagonist of ''Day of the Diesels'', ominously looking down from a bridge -- where an earlier chase took place -- at the steam engines attending the grand opening:
-->'''Diesel 10''': You'll be laughing on the other side of your boilers soon, silly steamies!
* SurroundedByIdiots: His henchdiesels, ranging from Splatter and Dodge to Den and Dart, who are never anywhere near as vicious nor as smart as he is. He even frustratedly ditches the former two in his first appearance to go after Thomas and Lady himself.
* TooFastToStop: What ultimately defeats him in ''Thomas And The Magic Railroad''. While Diesel 10 is faster and stronger than both Thomas and Lady, they're small enough to cross the collapsing viaduct while ''he'' can't due to his bigger size and weight. This also means he's unable to slow down in time to avoid falling.
* VileVillainSaccharineShow: Compared to the actual series, where most of the bad guys were easily controlled by the Fat Controller, Diesel 10 in TheMovie with his plans of destroying all steam engines is much more dangerous. Dialled back in later televised appearances, where he's more just a trouble-making bully with [[WellIntentionedExtremist legitimately good intentions deep down]].
* VillainousBreakdown: Diesel 10 has several of these, like when he loses his composure and is forced to flee when Mr. Conductor threatens him with [[WeaksauceWeakness sugar]]. He also has one when he goes off the collapsing viaduct during the final chase sequence, reduced to futilely yelling insults at Thomas and Lady before he falls.
-->'''Diesel 10:''' [[TooFastToStop Whoa, whoawhoawhoawhoa]]'''[[TooFastToStop WHOA!]]''' (''grabs onto one of the broken rails with Pinchy'') Argh! '''PUFFBALL! TEAPOT!''' (''the broken rail snaps, causing Diesel 10 to plunge into a boiler sludge-filled barge far below'') '''IN''COMIIIIIIIIING!'''''
* WeaksauceWeakness: Apparently, pouring sugar in Diesel 10's tank will prevent him from ever working again. [[MakesJustAsMuchSenseInContext And before you ask]], yes, [[SincerityMode that]] ''[[SincerityMode is]]'' [[SincerityMode a legitimate weakness]].
* WellIntentionedExtremist: Essentially the motivation for his actions in the CGI Series, he just wants the diesels to receive more attention since they always appear to be neglected, and he seems to apologize if he's made a mistake; for instance, giving the Steam Engines their own decorations, since he ruined theirs thinking that the Dieselworks wouldn't have any decorations.
[[/folder]]

[[folder:Paxton]]

[[quoteright:185:https://static.tvtropes.org/pmwiki/pub/images/185px-gordonrunsdry9_42.png]]

--> "Hi, Stephen. Thomas lost his puff and I'm trying to find it and...well, I thought that might be...the lost puff...up there..."

-->Voiced by: Steven Kynman

--> Basis: British Railways Class 08 0-6-0DM

--> Built: 1952/1962

A soft-natured, if somewhat ditzy diesel who works with the Narrow Gauge engines in Blue Mountain Quarry. Friendly towards steamies, but tends to hang with a bad crowd.

* AscendedExtra: Started as a MerchandiseDriven extra. Following "Blue Mountain Mystery" he's a recurring supporting character and has even been granted his own limelight episodes.
* AttentionDeficitOohShiny: Even worse than Thomas. Look at that duck!
* BigDamnHeroes: In ''Blue Mountain Mystery'', [[spoiler:just as Diesel rats out Luke to the Fat Controller, Paxton arrives with Victor, who clears up everything.]]
* CharacterizationMarchesOn: In his earliest appearances, Paxton was a background associate of the other diesels and often joined in heckling or tormenting other engines. "Blue Mountain Mystery" onward, his meek kindly persona is established.
* CloudCuckooLander: Usually spacey, though he has occasional moments of clarity. He tries to warn Gordon to have his leaking boiler checked in "Gordon Runs Dry" for example.
* TheDitz: He is easily distracted.
* ExtremeDoormat: Though he will often ultimately draw the line when pushed into callous acts.
* {{Foil}}: Both him and Diesel are both Class 08's, and Paxton is simply the kind, yet ditzy counterpart to the callous and manipulative Diesel.
* KindheartedSimpleton: He is ditzy, but is one of the kindest diesels around.
* MinionWithAnFInEvil: To Diesel in "Blue Mountain Mystery". Also to Diesel 10 in "The Missing Christmas Decorations".
* NiceGuy: "Blue Mountain Mystery" onward.
* ToxicFriendInfluence: Hangs around with other more antagonistic diesels. [[ADogNamedDog Diesel]] in particular has been shown able to manipulate him into doing immoral deeds.
** Ends up playing this himself in "The Lost Puff" when he convinces Thomas to play on the damaged tracks. He is horrified when it causes an accident however.
* WindmillCrusader: Seems to be a recurring pivot in his limelight episodes, ComicallyMissingThePoint in some way or other and going on a wild goose chase, be it for "lost puffs" or disappearing diesels.
[[/folder]]

[[folder:The Diesel (D261)]]

[[quoteright:250:https://static.tvtropes.org/pmwiki/pub/images/e8e7a966b16355d3b7f3faa1e9709b36.png]]

-->"Not bad. I've seen worse. At least you're all clean."

--> Number: D261/D4701 (Book only)

--> Basis: British Railways Class 40 1Co-Co1

--> Built: 1958/1962

A diesel who was sent to Sodor to help the engines, but insults them by saying they were out of date. He gets his comeuppance as he breaks down by getting an inspector's bowler hat caught in his air intake. The Diesel crept away and leaves behind "a rather nasty smell and a battered bowler hat".

* ADogNamedDog: Yet another diesel who has Diesel for a name. Unlike both of the previous diesels sharing his name, however, this one does have D261 as a distinct alternate name.
* ChuckCunninghamSyndrome: He hasn't been seen since "Bowled Out".
* FantasticRacism: Towards steam engines.
* {{Jerkass}}: Very smug and disrespectful to steam engines.
* LaserGuidedKarma: Breaks down due to the inspector's bowler hat getting caught in his air intake.
* TheReasonYouSuckSpeech: Gives one to the engines, calling them out of date, which enraged them.
* SmugSmiler: He wears one as seen in his image above.
* SmugSnake: In ''Bowled Out'', his first words are "[[FantasticRacism Not bad. At least you're all clean.]]"
[[/folder]]

[[folder:Dennis]]

[[quoteright:250:https://static.tvtropes.org/pmwiki/pub/images/b4e6c4df222a009469790edf3210c8a2.png]]

-->"...I'm a really lazy engine..."

--> Number: 11001

--> Basis: Bulleid No. 11001 0-6-0DM

--> Built: 1949

A diesel who is lazy. He takes advantage of Thomas by letting him do his work for him, but after he reversed into a ditch, he learns his lesson, and with the help of Thomas, he gets his work done, and promises to be a Really Useful Engine. He has a twin named Norman.

* BrilliantButLazy: Unlike Norman who wants to be useful but breaks down, Dennis can work perfectly fine but can't be arsed.
* ChuckCunninghamSyndrome: He has not been in an episode since season 9 and ''WesternAnimation/TheGreatDiscovery'', but is mentioned to be Norman's twin.
* LazyBum: His main personality trait is his lazy work ethic.
* PolarOppositeTwins: Him and Norman. Norman wants to be Really Useful, but breaks down often. Meanwhile, Dennis works fine but is incredibly lazy. Dennis also has two eyebrows, while Norman has only one.
* TheSlacker
* TakingAdvantageOfGenerosity: Does this to Thomas who is having a day off.
[[/folder]]

[[folder:Norman]]

[[quoteright:250:https://static.tvtropes.org/pmwiki/pub/images/51a6c597458d503b38cedc606147f82f.jpg]]

-->Voiced by: Creator/KeithWickham

--> Basis: Bulleid No. 11001

An orange-red Diesel and is Dennis's twin.

* AscendedExtra: ''Somewhat'' in ''[[WesternAnimation/ThomasAndFriendsTheGreatRace The Great Race]]'', where he nearly has a collision with Thomas.
* BigOlUnibrow: He has one.
* DemotedToExtra: He was introduced as a MerchandiseDriven character in ''WesternAnimation/DayOfTheDiesels'', and was promptly banished to background appearances with no speaking roles shortly afterwards. Like Paxton and Sidney, he started appearing more often during Brenner's run as writer, though unlike them, he has yet to have ADayInTheLimelight proper.
* NiceGuy: In comparison to his twin, he is much kinder and more of a hard worker.
** He's even nice to the steam engines.
* PolarOppositeTwins: Him and Dennis. Unlike Dennis who works fine, but is very lazy, Norman wants to be Really Useful, but breaks down often. While Dennis has two eyebrows, Norman has only one.
* TheReliableOne: To the point The Fat Controller outright considers it OOCIsSeriousBusiness if Norman screws something up.
[[/folder]]

[[folder:Sidney]]

[[quoteright:250:https://static.tvtropes.org/pmwiki/pub/images/5ddb6c7e98c24d5fec87987dc4bb5e04.png]]

-->"What about me? I'm a decoration!"

-->Voiced by: Bob Golding

--> Basis: British Railways Class 08 0-6-0DM

--> Built: 1952/1962
* ADayInTheLimelight: In ''Sidney Sings'' and ''The Case of the Puzzling Parts''.
* AscendedExtra: He was promoted to the recurring cast in season 20, starring in his own episode, and has made many appearances since then.
* ButtMonkey: He spent two years on a hoist before getting new wheels.
* ForgetfulJones: Sidney's known for being forgetful, even forgetting how long he's gone without his wheels.
* KindheartedSimpleton
* MinionWithAnFInEvil: Much like Paxton, he seems pretty docile and somewhat simple, despite hanging around with the other more antagonistic diesels.
* ThePollyanna: Despite his bad memory and luck, he tends to remain jolly and positive. He quite merrily waited ''two years'' hoisted up in the Dieselworks before finally getting his new wheels fitted.
* PutOnABus: He hadn't been seen in any episodes between "Day of the Diesels" and "The Missing Christmas Decorations", spending two whole years unable to move because he lacked wheels.
[[/folder]]

* FauxAffablyEvil: Diesel 10 is firmly this in ''Thomas and the Magic Railroad'', where he often strikes up conversations in a faux-friendly tone with his would-be victims as he's threatening them. One good example of it is when he captures Mr. Conductor with Pinchy and threatens to drop him off a high viaduct if he doesn't tell him where the magic buffers are in short order:
-->'''Diesel 10:''' Hello, Twinkle Toes! Remember me? Fat Hatt won't have much use for you looking like that! (''laughs cruelly'') [[CallBack Ah, I see you forgot to bring the sugar. How]] ''[[CallBack careless]]'' [[CallBack of you!]] (''grabs Mr. Conductor as he tries to flee'') Say hello to Pinchy!

* TheDreaded: Right from his first appearance, Diesel 10 has this reputation among the other engines. Even when his villainy is considerably toned down later on, Thomas is terrified at the prospect of asking him for help in ''Calling All Engines!'', and [[LargeAndInCharge all the other diesel engines firmly answer to him]].

* EvilBrit: In the US dub of the television series, he speaks in a British accent due to him keeping his voice from the UK series.

-->'''Diesel 10:''' (''slowly realises he's okay'') Huh. Ah, well... nice time of year for a cruise. (''[[LaughingAtYourOwnJokes chuckles to himself mirthlessly]]'')

* BigBad: In ''WesternAnimation/ThomasAndTheMagicRailroad'', and ''WesternAnimation/DayOfTheDiesels''.