SSBB Play will be a completely new RP, so edit and remove characters/bios as you see fit.
But if I were you, I'd wait till I have Play up and running before you decide on characters. THere'll be some restrictions on characters, ones that I haven't imposed since the earlier days of RPing.
So I'll go ahead and post them now, so you don't have to wait til Play's up and running.
-Maximum of 5 characters per user. This may change over time.
-Your characters have to have been on a Nintendo console/handheld at least once. They don't necessarily have to be Nintendo characters, but they do need to have been on a Nintendo console/handheld.
So yeah.