You can play as these charecters by saving after you unlock them. They will each take up 1 block in your memory card. You can play as them by hitting a new icon at the top of the screen in charecter select. It will say load.

1.Peppy & Slippy:do easy mediem and HARD on 1p mode adventure&allstar with fox&falco.moves:same as fox&falco exept b smash is double pistols(you fight them as a
team if your fox you get falco if your falco you get fox on your team)

2:Sonic:beat 15 minite melee,100 man melee twice and,10 man melee 5 times.moves:b)spin dash.b smash)run.b up)third jump.b down)smash kick

3:Classic Mario:beat classic mode with all mario charecters on mediem.moves:b down)fire mode-normal mode switch.b)normal:mushroom fire:fire ball.b smash)smash oponent with
pirana plant.b u)super jump punch

4:Paper Mario:beat all events 2 times then pres on the middle of the d-pad two times as in 2d.moves:b)hammer.b smash)kooper.b up)parakary.b down)bombette.a) goombario stops the
game and gives you infermation on a selected oponent he tells you their strenths and their weaknesses.but be carful becuase if your against another player they can find out their strenths against paper mario.