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- BillyKing (ビリーキング?), also known as ZapKing, RoiZap and BorRey, is a stronger BillyAce.
- BillyJoker (ビリージョーカー?), also known as ZapJoker, JokerZap and BorJota, is a stronger BillyKing.
BillyAces appear in the Mega Man Star Force anime series.