Teen Titans (2003)

Bunny Raven or How to Make a Titananimal Disappear - S3-E11

Continuity mistake: Beast Boy is drawn onto the stage for a plate-juggling number. We see Mumbo balancing three plates (excluding Beast Boy) with his hands and left foot. But (again excluding Beast Boy), it's four plates getting smashed on the stage.

Titans East (1) - S3-E12

Continuity mistake: Robin calls up Cyborg as he makes his way to Steel City. When we see Cyborg on screen, the sky is daylight-blue and a bit cloudy. When Cyborg is seen personally, however, it is night outside - i.e. a dark clear sky full with stars; and when he activates the T-Car's hover function, it is still night, but the starry sky has suddenly become heavily clouded.

Titans East (1) - S3-E12

Continuity mistake: Steamroller has two hands encased in cone-shaped gauntlets, but whenever he puts them together to pin someone down, the gauntlets assume a cylindrical shape. It happens every time we see this character in action throughout the show.