Starring: Chad James, Ben Singer
Thor vs. Wonder Woman - S4-E13
Continuity mistake: Thor goes from having the Warrior Madness and getting hit once with Mjolnir to being on his knees without the Warrior Madness, all within a single edit without ever cutting away from Thor in between the two shots.
Samurai Jack VS Afro Samurai - S5-E9
Continuity mistake: After jumping right behind Jack, Afro attempts to stab him, and Jack avoids it. When Jack turns back to face Afro, it looks like there is a bit of distance between them, despite Afro being right behind Jack in the exact previous shot.
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)