Tanks For The Memories - S5-E15
Continuity mistake: The boys had different haircuts in the previous episode. Randy had just gotten a haircut, and in this episode, the kids are younger and have their longer hair right back. (00:05:50)
Doug Takes a Hike / Doug Rocks - S1-E4
Continuity mistake: When Roger is dancing in Skeeter's yard, he changes color.
Continuity mistake: When Janet gets off the phone with Clarissa's principal, Clarissa is standing on the right side of her friend. The shot changes and she is now on the left.
The Crab with the Golden Claws: Part 1 - S1-E1
Continuity mistake: Tintin is locked in a room tied up to two pipes. There is rope around his torso and ankles which is connected to the pipes above and even his arms are tied up, connected to the pipes behind him. Allan then enters the room and the rope that was connecting his arms to the pipe is now nowhere in sight. It is partially visible for a few frames, but then vanishes for the rest of the shot. Then when the shot cuts to Tintin, there is suddenly rope wrapped all around the pipe behind him. (00:12:35)
Bug Off/The Crawl Space - S9-E5
Continuity mistake: In Moving Away, Tommy tells the other Rugrats how they first met when Angelica lied about the nasty things they did. However in the Crawl Space, there is a flashback of Tommy, Chuckie, Phil and Lil playing in the playpen when they were younger. Chuckie is scared of the Jack-in-a-box in that flashback, so the Rugrats could not have met for the first time back then.
Continuity mistake: When Marshall first finds Trip's letter, he holds it from the left side. In the close-up, he's holding it from the right side. (00:02:10)
Continuity mistake: After Michael's tooth falls out, the toys go to clean it. When they accidentally squeeze the toothpaste on each other, it finally shows Alfred holding up the toothbrush correctly because Diesel can't seem to, Alfred's appearance is short, dark green and smaller in size. But then Johnson appears and says "I'm going to remove this toothpaste tube before it causes anymore damage" the shot cuts to Alfred with the toothpaste squeezed on him, and his appearance has changed; with a larger head, bright green body and larger in size. A few shots later, he is back to his original form.