Iggy: Can make opponents dizzy and disoriented, and mess up controls, like in Mario & Luigi: Superstar Saga.
Morton: Could throw bombs, like in Yoshi Safari.
Lemmy: Could throw boucing balls everywhere, while riding on his own, like in Super Mario Bros. 3.
Larry: Could smack fireballs everywhere with his tennis racket, like in Mario & Luigi: Superstar Saga.
Ludwig: He could teleport around and summon lightning, like in Hotel Mario.
Wendy: Could shoot her rings out and use them to constrict opponents, like in Mario & Luigi: Superstar Saga.
Roy: He could jump around, and whenever he landed on the ground, he would send out a shockwave to stun enemies, like in Super Mario Bros. 3.
Bowser Jr.: Can use his Magic Paintbrush to cover the feild in paint, which characters slip around on out of control.