Continuity mistake: If you notice, Robbie's puppet "Rex" is bigger in this episode. (His head is huge.) But for the rest of the show his head is smaller.
Beauty and the Obese: Part 1 - S1-E1
Continuity mistake: Once the episode cuts to the inside of the Tender Loin club, a stripper dressed in blue and yellow is on the table with a very large group of men sitting around her. Once the kid comes in with the fake I.D. and is shown around by the manager, suddenly the crowd around the stripper's table is much smaller. (00:01:54)
Continuity mistake: When Shelly is arguing with her old friend, she turns around and crosses her arms. However, after a cut, her arms are suddenly not crossed. (00:22:30)
Factual error: When Charles Barkley says "Welcome to the NBA" after dunking on Mark, the ceiling shown above Barkley is way too low to be the ceiling for Haas Pavilion at UC Berkley where the game is being played. It only appears to be about 30 feet high.
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When the Koopalings start approaching Prince Hugo's castle, they are holding weapons, but in the next shot, they disappear. In the same shot, Cheatsy's blue hair turns yellow. (00:03:06)
Beavis and Butt-head vs. the Vending Machine - S4-E28
Continuity mistake: When the woman is closing the door to the women's restroom, the doorknob briefly changes from gold to gray.
She-Ra VS Wonder Woman (He-Man VS DC) - S7-E10
Continuity mistake: In the intro when Boomstick is explaining She-Ra's sword, he mentions it's ability to freeze. After this it cuts to a close up of Wiz and suddenly he is further away from their TV with more of his desk and station positioned to his right, our left. (00:02:50)
Looking for Love in All the Wrong Places - S2-E17
Continuity mistake: How Brian is holding the mug changes between shots, when Joe gets the gift from Helen.
Gift Horse - S4-E5
Continuity mistake: After Iola gives Mama the tissue box, Mama goes inside and drops the tissue box and the tissue paper on the coffee table. The positions of both these things (and another knick-knack that was already on the table) change between shots.
Continuity mistake: When Dan and Louise are talking about graduation moments in the kitchen, Dan's iPhone keeps changing positions in his shirt pocket. In some shots, it's upside down, and in others, it's upright. (00:07:56 - 00:09:26)
Visible crew/equipment: When Marcy announces they only have time to grab their most precious personal possessions Kelly notes her own, and in the next shot the boom mic makes a happy appearance at the top of the screen. (00:07:45)
The Retainer - S1-E2
Other mistake: The gas chamber is destroyed when the dogs pull a chain that's attached to its front support but it somehow collapses from behind. (00:19:07)
Visible crew/equipment: During the 'five years later' scenes, Chester, Jim, and two others arrive at the inn, and when Chester begins his tale of moving to Marina del Rey, we can see boom mic movement at the top of the screen, then as Jim mentions their houseboat being a few slips down from Robert Goulet, the boom mic dips way down into view, over Chester.
Continuity mistake: When Max challenges the Shark to a game of pool, Max's hand holding his cigarette jumps to the tip of his pool cue, and a chalking cube appears in his hand from nowhere. (00:19:00)
Olga Comes Home / Sally's Comet - S1-E15
Continuity mistake: In Sally's Comet when Gerald, Arnold, and Grandpa are in the traffic jam on the way to Hawk Mountain the position and type of cars around them change. When we first see the car there is a truck there and no room for them to turn around. When they do turn around then there is room and the truck is gone.
Polly Wants a Treasure - S1-E8
Continuity mistake: In the scene where Baloo and Kit walk through the Sea Duck's cargo area to try and find who they think is a stowaway, Baloo lifts a crate of fragile crystal glasses over his head. The crate rotates between shots, judging by its red "Fragile" stamp.
Visible crew/equipment: At the very end of the episode, the top of the set and crew lights are visible on the top on the screen.
Continuity mistake: When Dave enters the room with champagne glasses to celebrate his terrible idea, in a brief shot as he enters he's holding the glasses upside down. We cut to the other angle when he asks Alex to help him, and they're now held the right way up. As she takes them off him the angle switches again, and they're back to being upside down. (00:12:00)
Buttercrush / Fuzzy Logic - S1-E4
Continuity mistake: When Buttercup punches a hole in the wall to see her sisters are being lowered into lava, the hole's initially quite small. In the next shot, the hole is noticeably bigger.