A brawler game for the WiiU and 3DS.
Godzilla and 7 other kaiju are pulled into the Mushroom Universe via an experimental interdimensional vortex. By that time, Iggy invented a machine that will enlarge anything but non-Koopa Troop members. But the monsters grow along with them! Now the monsters, by instinct, are destroying the Koopa Troop!
- Godzilla (Millennium Era) - a mutated Godzillasaurus that helped the Japanese soldiers during World War II on Lagos Island. Can breathe atomic fire. (World 1, World 8 Castle, and multiplayer only)
- Anguirus (Millennium Era) - a mutated Ankylosaurus that - like the second Godzila - survived the K-T Extinction Event. Screeches for self-defense. (World 2 and multiplayer only)
- Fire Rodan - a new species of Pteranodon. Like Anguirus, he survived the extinxtion of the dinosaurs because 2 eggs of the species were buried underground. Shoots a uranium beam. (World 5 and multiplayer only)
- King Ghidorah (Millennium Era) - a member of the artificial Ghidorah alien race. A 3-headed wyvern that shoots gravity beams in the form of electricity. (World 8 and multiplayer only)
- Gigan (Millennium Era) - a cyborg reptilian from M Space Hunter Nebula. Has a buzzsaw in the abominal area. Scythes can be upgraded into dual chainsaws. Possesses laser vision. (World 7 and multiplayer only)
- Mechagodzilla (Showa Era) - a robotic replica of Godzilla. Also possesses laser vision. (World 6 and multiplayer only)
- Titanosaurus - a cyborg aquatic sauropod dinosaur. Only known weakness is high-frequency sound. Shoots low-frquency soundwaves. (World 3 and multiplayer only)
- Zilla - a mutated sea iguana, the effect of a French neuclear missile fallout. Fights with instinct rather than reason. Also has atomic fire breath. (World 4 and multiplayer only)
- the Mobile Operation Godzilla Universal Expert Robot Aero-type (Heisei Era) - the first robotic anti-Godzilla weapon. Once controlled by aliens and was destroyed. The second was based on the original. Laser vision.
- Varan - a mutated draco lizard. Fire breath.
- Mothra (Millennium Era) - a divine moth who is a happiness diety.
- King Kong (Millennium Era) - the last of the Megaprimatus kong.
- Gamera (Showa Era) - a prehistoric turtle universe guardian.
- Barugon - a giant lizard with a rainbow back ray.
- Gyaos (Showa Era) - a Pteranodon-bat hybrid.
- Manda (Millennium Era) - what is most likely a mutated eel even though he resembles a Chinese dragon.
- Baragon (Showa Era) - a burrowing dinosaur.
- Ebirah (Millennium Era) - a mutanted shrimp.
- Mechani-Kong - the robot Megaprimatus counterpart of Mechagodzilla.
- Gorosaurus - a fire-breathing theropod.
- Kamacuras (Millennium Era) - a mutated mantis capable of camoflauge.
- Kumonga (Millennium Era) - a giant spider that can shoot silk darts.
- Hedorah (Millennium Era) a pollution monster.
- Jet Jaguar - a humanoid, size-altering robot.
- Megalon - a drill-handed rhinoceros beetle god.
- King Caesar (Millennium Era) - a lion-dog hybrid god. Solar beams.
- Mecha-King Ghidorah - King Ghidorah 's cyborg form.
- Mechagodzilla 2 - the second Mechagodzilla.
- Kiryu - the third Mechagodzilla. Built around the skeleton of the first Godzilla. Equpped with the "Absolute Zero Cannon".
- Guiron - a knife-headed, burrowing lizard.
- Zigra - a humanoid, sentient shark.
- Battra - the always-angered yin to Mothra's yang.
- SpaceGodzilla - the second, more heavily-modified clone of Godzilla.
- Biollante - a mutated human-rose-Godzillasaurus triple hybrid.
- Destoroyah - a mutated Pre-cambrian crustacean colony.
- Orga - a mutated Millennian-Godzillasaurus hybrid.
- Zedus - what appears to be a semi-aquatic thorny devil.
- Megaguirus - the quen of the meganula.
- Obsidius - an igneous monster. Created by SpaceGodzilla.
- Krystallak - a crystal monster. Also created by SpaceGodzilla.
- Bowser Jr.
- Larry Koopa
- Morton Koopa Jr.
- Wendy O. Koopa
- Iggy Koopa
- Roy Koopa
- Lemmy Koopa
- Ludwig von Koopa
- Dino Piranha
- Petey Piranha
- Morton Koopa Sr.
- Grass Land King
- Desert Hills King
- Ocean Side King
- Big Island King
- Sky High King
- Iced Land King
- Pipe Maze King
- 1-7. Koopalings
- 8. Bowser
- 1. Petey Piranha
- 2. Mummipokey
- 3. Gooper Blooper
- 4. Dino Piranha
- 5. Vulture King
- 6. Rollodillo
- 7. Megaleg
- 8. Bowser Jr.