Other mistake: The battle droids - including the commando droids featured here - habitually have two broad fingers and a thumb. So how can a commando droid squeeze itself completely into clone trooper armor without its broad fingers tearing open the gloves, since it can't separate its fingers?
Bat Mitzvah Crashers/Super Secret Weakness - S1-E5
Continuity mistake: In "Li'l Orphan Happy" when Ben makes his mom the tuna salad, it has lettuce around it, but in the close-up the lettuce disappears. When it gets zoomed-out on, the lettuce is back.
Triumvirate of Terror! - S3-E8
Continuity mistake: At the diner when Superman, Batman, and Wonder Woman are discussing the Superhero Memorial Time Capsule, Wonder Woman's cup is next to her arm. Then a few shots later, without her touching it, the cup is suddenly much closer to the edge of the table. (00:09:10)
Iron Forged in Fire: Part One - S1-E1
Continuity mistake: Tony and Rhodey are confronting a guard outside Stark International, and in the first shot of the guard, his chest is fully light up by the sunlight. A couple shots later, without him moving or changing positions, a side view of them shows the guard’s chest half covered in shadows. (00:07:00)
Land of Hold/Penny Henny - S2-E17
Deliberate mistake: When Garfield brings Jon to the broken TV, the scene's animation is still unrendered. (00:01:04)
Continuity mistake: When Domino is playing pool, in the wide shot, she is shown at the one of the corner pocket sides of the table, with Toad perched on the left corner pocket across from her. When the shot changes to her getting ready to take her shot, she is now standing on one of the side pocket sides of the table, with Toad similarly perched on the corner pocket on the left across from her, only now it would be on the same end of the table where she was originally standing. (00:21:57)