Revealing mistake: When Pablo as the ping pong bandit takes Tyrone's paddle, Tyrone asks if he can play Pablo again so can get his paddle back. When Pablo walks into the frame, his skin clips out of his coat. This also happens when he does the "Bandit Slammit".
Continuity mistake: Fluttershy's neck disappears after she says, "I don't know if I can cheer enough to help her".
Slave Island - S1-E7
Plot hole: After Storm's attempt to escape the Genoshan prison is thwarted, she ends up in the ocean right at the shoreline of the beach, where she is captured by a Sentinel. Aside from the fact that it makes no sense for a Sentinel to be hiding in the ocean in the event that a mutant tries to escape the prison, there is absolutely no way that a two-story tall robot could hide in the ocean right by the beach, as the water would be way too shallow. You can even see that the water level only goes up to the Sentinel's ankle area when it is standing upright in the ocean. (00:03:15)
Suggested correction: Perception. (1) The Sentinel isn't as close as it appears. If it were close, then she would have been caught in its waves as it emerges. Also, she would be looking only at its chest circle. It's several yards away. (2) She washes ashore. She fell from the sky. She couldn't have fallen from that great height into shallow water without hitting bottom. (3) It's also a two-story tall robot. Its weight would sink it into the sand. So it could have very well been down that deep.
Sentinel never sank into sand in other episodes.
Well, it's shown here.
Pooh's Double Trouble / Eeyore Sleeps on It - S1-E19
Factual error: The letters and symbols on the characters' reflections in the mirror look like their regular counterparts, when they're supposed to be in reverse.
Unicorn Club/Go Gomez! Go! - S1-E2
Continuity mistake: When the cats are entering the race the height of the sign lowers when Waffle walks up.
Continuity mistake: The broken glass on Nathan's face and arms disappears when he is pouring out the rice, but reappears when he is yelling into the PA system.
Well Bargained and Done - S1-E2
Character mistake: Tybus says he has a lance of 5 mechs. In Battletech, a lance is 4 mechs. While a Clan star does have 5 mechs, Tybus is an Inner Sphere character.
Continuity mistake: Just after Otis makes the ghost sounds from inside the house, it shows the gang standing together outside the house. Otis is with them outside, which is impossible, as he is inside the house pretending to be the ghost.
Fiend is Like Friend Without the 'R' - S1-E4
Continuity mistake: Mandy hits a baseball with one of Grim's bones, yet when we see Grim, there are none of his bones missing from his body.
The Secret Of The Juice - S1-E10
Continuity mistake: When Tummi goes looking for Zummi, Gruffi and Cubbi, he arrives right outside the barrel room. When first seen, the barrel room door is smooth, but in the next close-up the door suddenly has an iron grill window in its surface.
Half-Baked - S2-E2
Continuity mistake: There are three boxes of cupcakes stacked on the coffee table. However when Trixie picks them up, as the shot changes there are now five boxes of cupcakes. (00:12:10)
Continuity mistake: In the scene where Thugnificent is giving Riley is new chain and holds a speech, we can see that Riley's chain is as long as Thugnificent's. However, when he actually hands it over to Riley and when Riley does wear it, the chain is considerably shorter to compensate for Riley's length. (00:10:10)
Happy Birthday, Kevin (or Happy Birthday, Douchebag) - S1-E12
Continuity mistake: After Carlos sees the snake on the pole he leaps off the roof onto the pole. When he jumps you can see it's quite a distance from the roof. After catching the snake he is holding onto the pole and asks to be helped back onto the roof. The other characters just put their hands out and pull him up. There was no way with the distance between the pole and the roof they could have come close to reaching him the way they did.
Continuity mistake: In the scene where Mr. H. Makes Bloo wash his hands, Mr. H takes off his gloves and washes his hands then dries them. Notice that as soon as he takes his hands out from underneath the towel his gloves are back on.
Continuity mistake: When Kimiko says "Will you two please stop abusing the English language!", Raimundo's eyes are blue.
Continuity mistake: When the Warners emerge from a sealed crate on Miss Flamiel's desk and start singing, Yakko instantly appears behind Wakko and Dot as soon as the shot changes.
Continuity mistake: Race secretly snaps a picture of his double, but later in the episode the developed picture shows Race's double and the big henchman standing side-by-side, as if they posed for the picture.
Origin of Iron Man: Part 1 - S1-E11
Character mistake: When young Tony Stark is telling his father that their helicopter's anti-flak chip didn't kick in, he acknowledges that it was his fault by saying he blew it. When his father corrects him and says "No Tony, we blew it. Stark and Son," Tony defensively says "The anti-flak chip failed, it's not my fault," completely contradicting what he said seconds earlier. (00:14:00)
Continuity mistake: When Lin lifts the rocks around the house in the final scene, there are eleven of them. But in the last shot, there are only eight rocks.
Continuity mistake: When the gang arrives at the fashion show, they park the Mystery Machine at the end of the walk way. But when the head of the fashion show is shown, the Mystery Machine has vanished. (00:03:05)