I'd like to see Little Mac in but.. what would his move set even be? The only special thing he had in Punch-Out was his star punch and eating Doc's chocolate bar.
Actually I can see a type of play style that is focused on Little Mac and how he play's in his respective games.
Little Mac in universe is a character based on using high speed to counter his opponents then strike, or striking when their guard is down.
Little Mac could have a move set where he has a Star gauge that fills up by hitting opponents with high priority moves
after dodging and by smacking them when they are taunting (fills up more this way). The star gauge powers up Little Mac's Smash attacks giving them more power, speed and reach and after he fires his smash move the gauge empties completely or emptying a bit whenever he is hit.
Little Mac could pull a ness and have learned some move's from other people, like a bald bull side B and a super macho man style hook B that stuns opponets.
Physics wise I think Little Mac would have low movement speed (he never really runs around the ring in his games)but high dodge and attack speed (He is literally built around dodging and striking quickly)
Thoughts?