Yonbain (ヨンバイン Yonbain) is an enemy from Mega Man 10 that can multiply. Up to 4 can be onscreen at the same time. They appear in Solar Man's stage, Wily Castle 1 and Special Stage 2. In Hard Mode they also appear in Nitro Man's stage and Wily Castle 5.
- Yonbain's name is probably derived from the Japanese "yonbai", which means quadruple.