Use W,A,S,D to attack and arrows to move. Bomb-om has some combos if you can find them. After you click the green flag, press either z, x, or c. z: Bomb-omb X: Sandbag c: Zygarde 50% v:Zygarde 100%
Much better physics thanks to @Griffpatch_Tutor This is based off of Nintendo's Super Smash Bros. I did not create any of these characters.