Little Yama

 Little Yama is a robot and Mr. Yama's weapon.

History
During Yama's little street fighting, he was fighting robot girl pink hair, which manages to defeat him in the first attempt. After that, Hiro Hamada comes over and asks if he can fight in the first attempt Megabot is defeated. A Yama amuses him this, but Hiro bet more money, in this second attempt with sudden movements MegaBot achieved derritar and halve the robot Yama. After the fight Hiro says, "Goodbye, small Yama. "