Super Brawl 2 Dr. Blowhole Playthrough 

A combo in a normal fighting game: when you hit someone more than once, and when the first hit connects, the other hits can't be blocked. The damage gets weaker as the combo goes on.
A combo in Super Brawl 2: When you get as many hits as you can get without getting hit back or having your hits blocked, and they'll continuously do more damage the longer you maintain the "combo."