I once tried to transfer missingno alone in the transfer box, but it said that there was no pokemon detected, so i put my dragonite in the box (which i didnt have in the game at that time), and it seems as though i FUSED missingno with dragonite, becase now my dragonite is named: M .

LOL

i think you can go to the name rater (if there is one) and switch therie names back. Problem solved!