The Mini Rocket Speeder is a small, fast speeder Ryo built. The speeder had a very powerful rocket, but no other armament, making it single use when attacking. It stood on three static 'legs' when it landed.
Upon its completion, Ryo went out on patrol to test the Mini Rocket Speeder, and found the Combat Crawler X2. He was defeated and captured, and put inside a holding cell at the back of the robot machine. When the machine was destroyed by Ha-Ya-To in the Aero Booster, he escaped and returned to the Golden City.