* HeyItsThatVoice: Cathal J. Dodd reprises the role of Wolverine from [[WesternAnimation/{{X-Men}} the hit 90's cartoon]].
** [[VideoGame/ResidentEvil2 Ada Wong]] is the announcer!
* MarthDebutedInSmashBros:
** Saki Omokane, a character who would've remained in an obscure [[http://www.hardcoregaming101.net/quiznanairo/quiznanairo.htm Japan-only trivia game]] had it not been for her appearance.
** Most fans had no clue who [[VideoGame/{{Cyberbots}} Jin or Devilotte]] were when they made their debut in this crossover.
* WhatCouldHaveBeen: An [[OriginalGeneration original]] JokeCharacter, Tomichin, was originally planned as one of the Assist Partners, but couldn't make it into the game. [[spoiler:He is also an {{Expy}} of [[Series/SesameStreet Bert]].]]
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