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Masa, named Momokawa in the Japanese version, is a character from Medabots Spirits.
He controls an armada of over 10 Skelbots at the same time and uses them to gang up on his opponents. He was first sent out to show the inferiority of Medabots to Kilobots by defeating as many as he could with his armada, but he met his defeat at the hands of Roks and the Mystery Medafighter.
Next time he appeared was when he and his Skelbots ganged up on Metabee when Ikki wasn't around, but they were defeated by Ginkai and Arc-Dash, despite cheating by dumping paint on Arc-Dash so he couldn't see.