This game's gameplay is strongly similar to MARVEL Ultimate Alliance.
It had been a week now, and nobody heard from Bowser. He hadn't even tried to kidnap Peach for a while. Toadsworth figured he was up to something, so Mario and Luigi went to check it out, when a black lightning bolt struck the castle and Peach was grabbed by a shadowy figure. Mario and Luigi pursued the shadowy figure.
- Princess Peach
- Princess Daisy
- Bowser Jr.
- Donkey Kong
- Diddy Kong
- Petey Piranha
- Funky Kong
- Dixie Kong
- Shadow Goomba
- Koopa Troopa
- Flamethrowin' Mecha-Koopa
- Dry Bones
- Hammer Bro.
- Boomerang Bro.
- Fire Bro.
- Dark Boo
- Monty Mole
More to come...
- World 1: Hypnotized Larry Koopa, Bowser and Bowser Jr.
- World 2: Wario and Waluigi (miniboss), hypnotized Roy Koopa, Mummipokey
- World 3: Petey Piranha (miniboss), hypnotized Iggy Koopa, King K. Rool
- World 4: Hypnotized Lemmy Koopa, Gargantu-Cheep
- World 5: Hypnotized Wendy Koopa, Chief Chilly
- World 6: Hypnotized Ludwig Koopa, Lakithunder
- World 7: Hypnotized Morton Koopa, King Boo
- World 8: Koopatrol, Shadow Mario, Culex