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)
Beware the Third Wish - S1-E31
Continuity mistake: The Wicked Wisher throws giant exploding coins onto the field TJ is on, as TJ runs towards the WW. The giant coins remain on the field after they explode, yet when TJ reaches the top of the field, there is no sign of the coins, or their remains.
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: Matthew invited Ingrid to eat with them in the previous episode. In this episode, he acts like he's meeting her for the first time.
Continuity mistake: When the bullies put the snake in Courtney's bag, it's brown. When Finley takes it out, it's changed to black, and is also a rubber snake. And when Courtney picks it up, it's real again, and is now yellow.
Continuity mistake: Right at the beginning of this episode Kevin and the twins are making sandwiches. Lucy comes into the kitchen and kisses Kevin, then David asks where their (his and Sam's) kisses are. As this scene goes on, the shots ranging from views of all four to focal shots, David's sandwich is finished and on the (viewer's) left side of his plate, then unfinished, topped with lettuce instead of bread and on the right side of the plate. It goes back and forth between these two sandwiches. Also, at about 00:05:04 as Kevin and Lucy walk away, Sam's sandwich suddenly loses its top piece of bread. (00:04:40)
Continuity mistake: In many of the early episodes Miss Jane drives a 1962 Plymouth convertible, but gets out of a 1963 or 1964 Dodge.
Continuity mistake: After Herman breaks through the doors in the opening sequence, the underlying wood over the right side of the hole is plain plywood. When it's Lily's turn to come out, the wood has been stained to match the rest of the door, and Herman's outline is more distinct.
Continuity mistake: When Miss White is writing Mrs. Heimer on the chalk board, the camera shows Kevin/the class, when the camera comes back to her, she has a different sweater, hairstyle, and her name is written in a different spot. I'm not sure if this is some kind of flash to when everyone comes back to school after summer, or an error.
The Search - S4-E15
Continuity mistake: When John borrows Vern's blue car to search for Olivia and the kids, its license plate number is "45-2678" in wide shots, but when John-Boy spots their truck at the side of the road John stops short, and the license plate number is "84-6209" in the closeup. (00:17:10 - 00:18:45)
Continuity mistake: In the cake song, Stingy puts in chocolate but never picks up the bowl. A few shots later, he is now holding the bowl.
Sky: Part 1 - S5-E1
Continuity mistake: The baby carrier little Sky is in as the group heads towards the car changes between takes. When they are walking down the driveway, it is open, and Sarah Jane quickly closes it when Gita comes up. Gita opens the carrier, to discover the baby, and Sarah Jane closes it again. There is more dialogue and Gita goes back to cooing at the baby. When did the carrier open again? Then the car alarms go off and if you look closely, you can see it's closed again, which is confirmed when the baby is handed off to Clyde.
Continuity mistake: When Peter bring his bag's into Henry's room, if you look closely at the wall behind Peter it is pink, but in the next shot if you look to the right, the wall is green - the usual colour, it then reverts back to pink again.
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: Before Charlie says to Lola "You must double-triple promise you'll never play with it", he places the rocket beside a black box. Later in the episode, when Lola attempts to get the rocket down to play with it, the rocket is now on top of the black box.
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: On the school dance KC takes out her earrings and lays them on the table, but when she is locked in the A/V room she has her earrings on. (00:22:17 - 00:23:24)
Continuity mistake: During his first day of school, Morgan says goodbye to his mom, extends his arms and says "Here we are." From the opposite angle his arms are lowered.