its May from pokemon ruby, saphire and emerald and she commands Mudkip, Grovyle and Blaziken

Mudkip:
B=mud shot-can be charged up
B(side)=muddy waters-like waterfall but sideways
B(down)=pokemon change(Grovyle)
B(up)=bubble-floats up with the help of some bubbles

Grovyle:
B=bullet seed-like ivysaur but sideways
B(side)=X-scissor-a slash that can be charged up
B(down)=pokemon change(Blaziken)
B(up)=leaf blade-like marth's up B

Blaziken:
B=blaze kick-can be charged up
B(side)=srtengh-pushes a boulder that slides down the stage
B(down)=pokemon change(Mudkip)
B(up)=sky uppercut-jumps with his fist engulfed with flames in the air

Final Smash:
Mudkip:Earthquake
Grovyle:Leaf Storm
Blaziken:Overheat

Coming soon Pokemon Trainer 4...