I think it'd be cool to have them as like a double thing like they did with the Ice Climbers. Considering all the combinations they had together in the RPG game they could have a pretty awesome moveset.
Would rather have Super Baby Mario, solo, and with the cape and diaper. That way he'd even further represent the Yoshi series in addition to including more moveset potential. --- My SSB4 roster prediction/wishlist: generous: http://i.imgur.com/TfnNN.jpg reduced: http://i.imgur.com/JSxGG.jpg
I wouldn't object to them, but I think Yoshi should have Baby Mario on his back in Smash Bros. Otherwise what's the point of making Yoshi seperate from the Mario series? --- "The greatest pleasure in life is doing what people say you can't do." ~Walter Bagehot