I feel like it only really works in a melee weapon sort of situation for the most part, so I would say like...Brutal Legend, which would be amazing. That game is very familiar to it right away, so it wouldn't be a very hard transfer into that setting. Would be so great lol
Final Fantasy would be pretty cool too as they could do it in a cross-dimensional way to get characters from the entire series in it, like how Hyrule Warriors uses time travel. I'm there with Mario also. I wasn't entirely sure at first, but imagining Bowsers Koopa Troopas and goombas going against toads would be pretty fun lol