HAHAHA. I know you want to teach you big clown a lesson, but SH@t falls down the hill. You are going to cause a downhill effect to that poor little guy who did nothing wrong. We Have to separate the two clowns. When meany is out of the pic the little guy can heal. Or vicersa if the little guy is out of the pic, the big guy will go back to his cute adorable self.
Worst case, exchange the little guy. But being beat up, locals are less likely to take him back. Not much a sale factor for the little beat up guy.
All my experiences with the big meanys of my tank. The little guy ALWAYS died. I have a blue meany & have not placed any fish in my tank...cause i CAN'T! I have a second tank & am waiting for extra funds to populate it. He so stupid he nips at my puffer! I beg the puffer to take him out of his misery & won't!! I don't have the guts to take him out..perminently!