This is a battle action adventure game in which players control a two-legged customized "Trot Vehicles" and aim to be #1 at the so-called "Vehicle Battle Tournament". Game play is supported for up to four players with the PSP®s communication function.

Story
Orion City is well known for its confident fighting vehicle riders and as the site of the Vehicle Battle Tournament.
The hero, a fledgling vehicle rider has come to Orion City to compete at the Vehicle Battle Tournament. Shortly after arrival in Orion City, the hero soon befriends Pola, a Trot Vehicle mechanic. But, no sooner has the hero made a friend than he runs in with a rowdy vehicle rider and becomes involved in battle.
Little do the fledgling vehicle rider and the Trot Vehicle mechanic know that they will trigger a world-shattering incident in Orion City.

Game Play
1. Heated battle action centered around "Vehicle Battle Tournament"
Trot Vehicles from all over the world fight and compete with each other with the aim of becoming #1 in Vehicle Battle Tournament.

2. Variety of jobs
Trot Vehicles can be customized to adapt its usage by changing parts of including the arms, body, and legs.

3. Multiple player game play in Ad-hoc mode
Heated and exciting game play for up to four players is supported with the PSP®s communication function.