Only the power of the dragon balls can stop me!
Title? Genre? Theme? Plot? Gimmicks?
And then it's revealed at the end they could still beat him, they just took pity and let him win.Regardless of what kind of game it would be, the plot should be about Waluigi being humiliated and laughed at by the other bros for doing x thing badly and you have to prove them wrong by mastering doing x thing and becoming better than them.