Yup. It works on mobile.
But beyond that, think of a 8-bit-esque platformer where every character you "load" into the game unlocks a new level (and you can use all 150+ figures in each of those levels).
How about a Pokemon: TCG-eqsue game where each character you load unlocks a different "booster" pack of cards that you could mix-and-match to play against others online?
A Kart-Racer where adding in figures unlocks different karts, levels and drivers.
A puzzle game (less non-ending Tetris-like, more set-solution puzzles like Picross) where loading in characters unlocks more and more puzzles.
They've done a little bit of this with the cell phone games, [the one I've played isn't anything to get excited over (and hardly utilizes anything with loading different figures in) - and the other two aren't on Android - one has pretty lackluster reviews, the other seems somewhat popular.], but more console-based and *more* to them.