Other mistake: When Shao Kahn rips M. Bison in half, M. Bison's hand is ripped apart too... and then stays attached to his body somehow.
Death Battle (2010)
1 other mistake in season 2 - chronological order
Starring: Chad James, Ben Singer
Starscream VS Rainbow Dash - S1-E17
Continuity mistake: Rainbow Dash catches Star Scream in a tornado and spins him around so fast in his jet form that you see one of his wings break off and fall away. He plummets to the ground and transforms into his robot form and begins to beg for his life. He suddenly has both wings again at this point.
Nightwing VS Daredevil (DC VS Marvel) - S5-E12
Nightwing: Hah, see you in Hell. (00:17:40)
Trivia: When Scorpion catches Ryu's fist, we get the first 2 hand-drawn shots in the history of the show. (00:12:00)