Fire Emblem - Lucina Smash Bros. Trophy

They could so easily make Lucina a playable character, maybe just as a Marth-clone. Do want.
But you know who would be even better?

It would make sense since she's the most frequent character in the FE series and actually has importance in the game now.
Boring ol' swordfighting aside, I imagine her smacking folks with sacks of gold, stealing items, pulling goodies out of the blue, and stuffing people away in giant bags.