Green-Eyed Transfer Student - S4.E8

The mysterious girl becomes a student in Lan's class, her name being Iris. Meanwhile, Zoano NumberMan appears and poses as Higsby's NumberMan in order to join his friends in visiting MegaMan (who is still recovering from last episode's damages). When the real NumberMan arrives, the two begin to battle until the true NumberMan is revealed, and the impostor escapes.