Mario?
Mario will last, because he's an iconic but also extremely universal character who can be applied to almost anything. No one would blink twice if there was a Pachinko Mario game.
Here's a better example, there was Hotel Mario on the Philips Cdi, nobody cares either way. When people mention Zelda, take one look at the Cdi games and are instantly revolted. Granted the Zelda games are a more distasteful representation of the Nintendo franchise, but it's also because the undertone of the games in general are a) more niche than a more universal title (eg Mario) and b) taken more seriously by its fans than said titles.
In conclusion Castlevania slot machines with chibi characters = Cardinal $in