5x22 - MegaMan NT Warrior

Raika and SearchMan assist in a virus protection program by acting as intruders to test the guard NetNavis, but the opponents that appear before SearchMan are MegaMan and ProtoMan. Raika suspects it's a prank, but MegaMan and ProtoMan then substantiate in the real world, and Raika is forced to use CrossFusion to battle them. In the end, the two are revealed to be phantoms.