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
Mewtwo VS Shadow the Hedgehog - S3-E6
Revealing mistake: During Shadow's Super Shadow transformation, half of the background becomes a green screen.
Nightwing VS Daredevil (DC VS Marvel) - S5-E12
Daredevil: I wish I could see the look on your face.
Nightwing: Me too. (00:17:15)
Trivia: When Scorpion catches Ryu's fist, we get the first 2 hand-drawn shots in the history of the show. (00:12:00)