Because of the perspective, I'm not entirely sure whether or not Maguro is genuinely spaced away from Risukuma (as would be the case with a Pokemon game or if he is standing right behind him). Looks like Maguro is poking him directly to move forward. That and I rather not believe RK was actually tossed out and released from a pokeball. Either way, I have no doubt that Risukuma will be just as effective, if not more so, than an actual Luvdisc in this (or any other) match-up. "Lover not a fighter" is Luvdisc's entire identity. I do hope RK is able to use Puyos in this crossover. Maybe he can overwhelm Hydreigon with a few sandwiches, a landslide, and finish it with some appropriate Kuma stacking.
Side note - Maguro was the least memorable character when I was playing the two Puyo Puyo Tetris games. Should I feel bad for not remembering him until I saw this in my feed?