Crusade is an expanding game that has brought a lot to the table.
No, this isn't a character suggestion (I have NO moves or anything planned)
In the data of Brawl, there's things labeled 'Pra & Mia' which people believe to be an early stage of Minun and Plusle being playable at one point, but kicked out in the end for unknown reasons. (It isn't confirmed to be them, but..)
Would they ever be considered to be part of Crusade, as a duo like the Ice Climbers? Maybe Tetra/Toon Zelda?
I know they would need a real reason to be in Crusade, but I'm only curious.