* ActorAllusion:
** A villain played by Creator/NeilPatrickHarris causes the cast to start singing against their will? [[WesternAnimation/BatmanTheBraveAndTheBold Where have we seen that before?]]
** He sings "Brand New Plan", which contains several shout outs to [[DrHorriblesSingAlongBlog another]] VillainSong Creator/NeilPatrickHarris has sung.
** Creator/BenedictCumberbatch's character in TheMovie leads the North Wind. He was [[Series/{{Sherlock}} previously associated with]] [[Recap/SherlockS03E03HisLastVow the East Wind]].
* CrossDressingVoices: TaraStrong voiced Eggy and at least one one-shot boy character. Of course, anyone familiar with more of her work would know [[WesternAnimation/TheFairlyOddParents this]] [[WesternAnimation/{{Ben10}} isn't]] [[FostersHomeForImaginaryFriends unusual]] [[{{Rugrats}} for]] [[AllGrownUp her.]]
* TheDanza: Fred Stoller as Fred the Squirrel.
* FakeBrit: Private's VA, James Patrick Stuart, is from California and is only half-British. {{Lampshaded}} during "Hard Boiled Eggy" when Skipper notes Eggy picked up "an adorably fake British accent" from Private.
** Mason's VA is American, and according to Private, Mason himself is secretly Canadian.
* HeyItsThatVoice:
** Danny Jacobs is King Julien, once again [[Film/EpicMovie filling in]] for Creator/SachaBaronCohen.
** Creator/JeffBennett is Kowalski.
*** In German, he's voiced by Oliver Feld, who voiced another of Bennett's characters: WesternAnimation/JohnnyBravo.
*** In Spain however, ''Private's'' voice actor (Javier Viñas) was Johnny Bravo.
*** Oliver Feld is also the German voice of Stimpy from WesternAnimation/RenAndStimpy... and so is the Mexican voice of ''Rico'', José Luis Orozco.
** Creator/JohnDiMaggio is Rico.
** Creator/KevinMichaelRichardson is Maurice.
** Marlene is voiced by Creator/NicoleSullivan. Her feral side is voiced by Creator/DeeBradleyBaker.
** Creator/NeilPatrickHarris is Dr. Blowhole.
*** And Creator/JimCummings voices his computer.
** Creator/RobPaulsen is Archie/Ze Archer.
** [[TheDanza Fred]], voiced by Fred Stoller, should sound familiar as Chuck the Evil Sandwich Making Guy to ''WesternAnimation/WordGirl'' fans.
** Creator/TaraStrong voices the ducklings and their mother.
** Music/GreyDeLisle voices the baboons.
** Creator/KariWahlgren voices Kitka the Falcon.
** Alice is [[Series/ICarly Mrs. Benson]].
** Creator/DiedrichBader is the Rat King.
** Creator/VictoriaJustice is Stacy.
** Creator/JennetteMcCurdy is Becky.
** Creator/ClancyBrown is Buck Rockgut.
** Creator/PeterCapaldi is Private's Uncle Nigel.
** Creator/BenedictCumberbatch is Classified.
* MissingEpisode: Several episodes appeared on DVD and/or Nickelodeon's website well before they made it to air. The last two episodes to be considered "missing" were "Truth Ache" and "Command Crisis", which appeared on the show's first DVD compilation but didn't air until November 2010.
* TheOtherDarrin: Among the eight voiced characters common to the films and the TV series (as mentioned, Phil doesn't talk), four have the same voice actors across the board: Tom [=McGrath=] (Skipper), JohnDiMaggio (Rico), Andy Richter (Mort) and Conrad Vernon (Mason). [=DreamWorks=] staff members Chris Miller (Kowalski) and Chris Knights (Private) were respectively replaced by Creator/JeffBennett and James Patrick Stuart; Creator/KevinMichaelRichardson took over Maurice's role from Cedric the Entertainer; and Danny Jacobs replaced Sacha Baron Cohen as King Julien.
* TalkingToHimself:
** Joey and Private are both voiced by James Patrick Stuart. They have some dialogue together in "Kanga Management".
** Creator/JohnDiMaggio also voices Burt the elephant. However, Rico and Burt have rarely been in scenes together, and have never conversed.
** Private and Mort in the Latin American dub.
* [[NamesTheSame Title's the Same]]: ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' and ''WesternAnimation/PhineasAndFerb'' have episodes titled "It's About Time"; all three episodes deal with time travel in a sense.
* TooSoon: Used by Kowalski in "Snakehead!" after Skipper's DisneyDeath.
* TropeNamer:
** NoseNuggets