Starring: Chad James, Ben Singer
Blade VS Buffy Summers - S12-E10
Visible crew/equipment: After kicking Buffy away and she hits a smiley face on the wall, Blade jumps at her and kicks off the wall to kick her again. If you look closely at the left side of the screen where the bathroom mirror is, you can briefly see a camera for a couple of frames filming the action just on the edge of the frame. The lighting in the bathroom makes it sort of hard to see. (00:21:16)
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: This was the first episode of the show with actual voice acting.