Something's Fishy with Commander Beef!

Something's Fishy with Commander Beef! or Commander Beef's True Identity! is the seventeenth episode (fourteenth in the English dub) of MegaMan NT Warrior.

Synopsis
2 on 2 battles continue: MegaMan and SharkMan (Commander Beef) vs. StoneMan and BlasterMan. StoneMan and BlasterMan open a hole in the arena, and the four NetNavis are quickly sucked out of the ring and into a cyber world. They have 10 minutes to return to the ring, or they will be disqualified. Finally, MegaMan and BlasterMan return, and MegaMan is victorious. But Lan suspects that Commander Beef is Maysa in disguise.