Stupidity: Yoshi, Mario's sidekick who constantly follows him on dangerous adventures and has gone on dangerous adventures by himself, gets scared shitless when confronted by Riptor. This is not how Yoshi would act in a situation like this.
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
Nightwing: What are you?
Daredevil: Better. (00:16:10)
Nightwing VS Daredevil (DC VS Marvel) - S5-E12
Trivia: This is the first ever Death Battle episode done in live action.