This gameplay has changed to train-and-battle gameplay.
During the time after Firework Run and Sandwhich of Death, however, the mysterious being appeared to find the legendary six strange orbs called Nanos Orbs shatters around the world. It also the Nanos Orbs hosting the data to creates a Nanos. Meanwhile at the Park, Mordecai watch the every commericals until the news about the Nanos Orbs creating the atomic waves into data hosts and transforming prehistoric creatures called Nanosaurs. Mordecai shocked the Nanosaurs invades the Park and attacked the cities.
- Mordecai (main playable in the begin the story)
- Muscle Man
- High Five Ghost
These Nanosaurs were mutant-like prehistoric creatures born by the speciemen fossils and host computer data then start to mutate.
- Shadow of Door
- Dr. Wackymad
- Computer Brain
- Laser Mingo
- Guardian Angel
- The Park
- Ground Ruins
- Assume Lake
- Radical Highway
- Blizzard Fountain of the Dragons
- Lava Cave
- It's second predecessor's features Lunar Fruit and Teeth Powered was no longer in the game.
- This Nanosaurs gameplay was similar to Battle of the Giants series.