[[caption-width-right:240:[[RockPaperScissors Jan-Ken-Pon]]!]]

''Alex Kidd'' was Creator/{{Sega}}'s former mascot, before SonicTheHedgehog was created. He starred in six games, all of them created between 1986 and 1990, and has had several [[TheCameo cameo appearances]] since then.

In the first game, ''Alex Kidd in Miracle World'', Alex is established as the [[RoyalsWhoActuallyDoSomething prince]] of a land called Radaxian. His job is to save the land from an EvilOverlord known as Janken the Great and rescue the royal family. This quest involves him traveling around in typical PlatformGame fashion, but with the additions of finding coins to purchase items and playing RockPaperScissors with bosses in order to be allowed to move on.

Most of the other games deviate from this storyline and [[GameplayRoulette feature different gameplay styles]]. Alex quietly faded away after the release of the original ''[[VideoGame/SonicTheHedgehog Sonic The Hedgehog]]'', but he has had appearances in a few other games, including ''VideoGame/{{Segagaga}}'', ''[[VideoGame/SegaSuperstars Sega Superstars Tennis]]'', and ''[[VideoGame/SegaSuperstars Sonic and Sega All-Stars Racing]]''.

The games that he starred in are as follows:
* ''Alex Kidd in Miracle World'' - UsefulNotes/SegaMasterSystem (1986)
* ''Alex Kidd: The Lost Stars'' - [[UsefulNotes/ArcadeGame Arcade]] (1986) and Master System (1989)
* ''Alex Kidd BMX Trial'' - Master System (1987, only in Japan)
* ''Alex Kidd: High-Tech World'' - Master System (1989)
* ''Alex Kidd in the Enchanted Castle'' - UsefulNotes/SegaGenesis (1989)
* ''Alex Kidd in VideoGame/{{Shinobi}} World'' - Master System (1990)

!!Tropes in the series include:

* AbandonedMascot: Alex himself replaced ''VideoGame/FantasyZone'''s Opa-Opa. Alex himself was later replaced with Sonic come ''VideoGame/SonicTheHedgehog1''.
* AlternateCompanyEquivalent: Alex Kidd was Sega's attempt at going toe to toe with Nintendo's Mario and acting as their mascot, but it never saw a speck of the plumbers success. Franchise/SonicTheHedgehog replaced Alex as this in light of the runaway success of ''VideoGame/SonicTheHedgehog1.''
* BlindIdiotTranslation:
** The translation in ''Miracle World'' isn't as bad as many other games from the same period, but it's still not very good. The dialogue is rather awkwardly translated, and certain words and phrases are put in "quotation marks" for no readily apparent reason.
** ''High-Tech World'' is far more guilty in this department. Notably, at one point Alex happens across a fast food stand which sells "humbugers."
* BossRush: In the penultimate level of ''Shinobi World'' you have to re-fight two of the three bosses you faced in the previous levels.
* {{Bowdlerise}}: In the Japanese version of ''Enchanted Castle'', the loser of a RockPaperScissors match would be [[ShamefulStrip stripped of their clothes]] (with appropriate SceneryCensor). For the international versions, this was changed to the loser [[AnvilOnHead getting crushed by a giant weight]].
* CharlesAtlasSuperPower: Alex has trained in the "Shellcore" technique enabling him to alter the size and toughness of his fists through sheer willpower and enables him to shatter rocks with his bare fists. In ''Miracle World'' and ''Enchanted Castle'', getting a Magic Ring upgrades it by allowing Alex to shoot a laser blast out, which will plow through several blocks at once.
* ChestMonster: TheGrimReaper randomly appears out of ? blocks, or if you touch a skull block.
* ClassicCheatCode: In ''Miracle World'', here's a Continue code in the game, but it's rather cryptic; If you lose all your lives and have over $800, hold Up on the D-Pad, and press Button 2 8 times, and the game will allow you to continue where you left off.
* ContemptibleCover: The NA release's box art for ''Enchanted Castle'' turns Alex from a cute kid with vaguely simian features into an incredibly gawky-looking dork.
* CoolBike: The Sukopako Motorcycle, which can be purchased in ''Miracle World'' and ''Enchanted Castle'', and is Alex's vehicle in ''All-Stars Racing''.
* {{Crossover}}: ''VideoGame/{{Shinobi}} World''.
* DamnYouMuscleMemory: In ''Miracle World'', the leftmost button (Button 1) is for jumping and the rightmost button (Button 2) is for attacking, rather than the other way around like most other platformers. The game's creator, [[WordOfGod Ossale Kohta]], admits in an [[http://sega.jp/archive/album/04_alex/03.html interview]] that he wanted to distinguish his game from ''Franchise/SuperMarioBros'' by making the controls a bit different. The latter releases of the game (including the one built into the Master System II) swapped the controls around to a more familiar setup.
* DerivativeDifferentiation: While Alex Kidd was obviously patterned after Super Mario Bros., the designers took careful steps to ensure it was not a complete ripoff. Alex punches enemies instead of jumping on them, you use the 1 button to jump instead of 2 (the opposite of Mario's "B to Run, A to Jump" control scheme) and you can shop for items like Motorcycles and a mini-helicopter, and equip items on the pause screen. There aren't even standard bosses, you "fight" the bosses in a Rock, Paper, Scissors match at the end of certain levels.
* DistaffCounterpart: Stella, who serves as the second player in the arcade version of ''The Lost Stars''.
* DolledUpInstallment: Two in particular:
** ''High-Tech World'' was originally released in Japan as a game based on the children's manga ''Manga/AnmitsuHime''. All of the character designs were redrawn and the storyline was changed for the localization.
** ''Shinobi World'' was originally planned as an unrelated ''VideoGame/{{Shinobi}}'' spin-off titled ''[[WorkingTitle Shinobi Kid]]'', which was supposed to star a new protagonist. It also had at least one other difference (see TakeThat, below).
* EarlyGameHell: The first level of ''Alex Kidd in Miracle World'' is a vertical oriented one where you go down instead of left to right, and it is much harder than the rest of the game, especially if you're trying to get all the money bags.
* EnforcedPlug: At the end of ''Alex Kidd: High-Tech World'', Alex sits down at a Deluxe Type cabinet of ''VideoGame/OutRun''.
* GameplayRoulette: Out of the games in the series, only ''Miracle World'' and ''Enchanted Castle'' are anything like each other. ''High Tech World'' switches from rudimentary adventure/puzzle to platforming/action gameplay partway through.
* GoshDangItToHeck: "Darn it, I lose."
* GuideDangIt: ''Alex Kidd: High-Tech World'' has a section to where Alex needs to bypass a guard in village to continue his quest. All the apparent solutions turn out to be {{Red Herring}}s, the actual solutions involve [[TrialAndErrorGameplay talking to the right people at the right in-game time]], or praying ''[[OneHundredAndEight 108]]'' times in front of a shrine. Doing anything else will result in either running out of in-game time or getting arrested. Given that the game was originally based on an anime, it's somewhat plausible that a Japanese player could figure it out, but it is extremely unlikely that a Western player could intuit either solution thanks to the change in setting that strips all context that could hint toward this.
* HotBloodedSideburns: Alex has EightiesHair sideburns and is a spirited KidHero.
* LuckBasedMission: There are items in ''Miracle World'' and ''Enchanted Castle'' that allow you to see your opponent's moves in a RockPaperScissors match, which help because you're pretty much lost without them. [[spoiler: (unless you know the patterns beforehand...)]]
* TheManBehindTheMan: The [[AllThereInTheManual manual]] for ''Enchanted Castle'' strongly implies that the game's villain, Ashra, was this to Janken the Great from the first game. [[spoiler:Which is evidently a case of LyingCreator, as the ending to the game reveals that he's actually just King Thor's servant and a BigBadWannabe with delusions of grandeur]].
* NoOntologicalInertia: Averted in ''Miracle World''. Killing Janken the Great doesn't really do anything to stop his forces or reverse his evil magic spells in of itself, and Alex has to obtain the Golden Crown in order to fully restore Radaxian to how it once was.
* OneHitPointWonder: In every game except ''Lost Stars'' and ''Shinobi World''.
* PowerFist: Alex's trademark Shellcore technique allows him to punch with an enlarged fist, which can be used to destroy blocks. You can find or buy a Magic Ring for it that allows you to shoot laser blasts from your fists in ''Miracle World'' and ''Enchanted Castle''.
* ProductPlacement: ''High-Tech World'' is about Alex going to an arcade to play Sega's games, and [[spoiler: the ending sees him sitting in an ''VideoGame/OutRun'' cabinet]].
* PutOnABus: After ''Alex Kidd in the Enchanted Castle'' flopped with critics and retail and ''VideoGame/SonicTheHedgehog1'' made Sega realize the technicolor insectivore was their real answer to Mario, Alex Kidd was dropped as their mascot in favor of Sonic and permanently retired from the companies game line-up. Kidd has made the occasional cameo since then, but he is largely forgotten today.
* RockPaperScissors: This is how some of the [[BossBattle boss battles]] are fought in ''Miracle World'' and ''Enchanted Castle'', and in the latter game, it is required to win items as well.
* SatelliteLoveInterest: Alex's girlfriend in ''Shinobi World'' doesn't even have a name.
* ShoutOut: Alex Kidd's brother Igul is the hero of Pit Pot, a slightly earlier Sega game for Master System.
* SpellMyNameWithAnS:
** In ''Miracle World'', Alex's brother is named "Egle" in the manual, and "Igul" in the ending to the game itself.
** Alex's dad gets it even worse off; In the manual his name is "King Thunder", the endgame scrolltext messes this up into "King Sander", and ''Enchanted Castle'' just gives up and names him "King Thor".
* TakeThat: In prototype versions of ''Shinobi World'', the first boss was named Mari-oh and resembled [[Franchise/SuperMarioBros you-know-who]] combined with Ken-oh (the first boss of ''Shinobi''). He was later renamed Kabuto and his appearance changed, but he still shoots fireballs and shrinks when weakened.
** FunnyAneurysmMoment: ''Shinobi World'' ended up being Alex's last game.
* TrademarkFavoriteFood: Alex Kidd is always seen eating a riceball in the in-between segments in ''Miracle World''. It was changed to a hamburger in the built-in versions in certain Master System consoles.
* {{Wutai}}: The setting of ''High-Tech World''.