Why isn't samus in a mario kart game?

[thetonestarr]

Metroid isn't cartoony enough, first off.

Second, most wouldn't consider the games Ms. Pac-Man is in to be "true" Mario Kart games. She only appears in arcade versions. With that said, Ms. Pac-Man is a cartoony arcade character. Makes sense that she'd be included in the arcade version.

 Third, Smash Bros. Kart wouldn't be a good idea. Interesting concept, maybe a fun unlockable on a Smash Bros game, but a horrible full-fledged standalone.