
Fruit Picking Day/Daniel Is Big Enough to Help Dad - S1-E11
Revealing mistake: When Daniel picks up the can of blue paint, it passes right through the cans of yellow and red without bumping them.

Continuity mistake: In the Season 1 episode "Too Cute," Quinn mentions to Sandy that Sandy picked out Quinn's outfit that she's wearing. This could not be possible as Quinn had that outfit (the same one she always wears in every episode) since BEFORE they moved to their current town and before the girls met anyone in their school they first went to in the first episode.

Wind Chimes - S1-E9
Visible crew/equipment: In the scene where Mcduff and Johnson are trying to find water since it's extremely hot, they go Under The Bed and notice Alfred under there. Look in the background, for just a split second, you can a man walk past the from the door. It's for only a split second so it's quite easy to miss. (00:06:05)

The Football Is My Best Friend - S1-E4
Audio problem: When Tsubasa says bye to his friends from the top of the overpass, his mouth is not animated for the greater part of the line. (00:04:30)

Deliberate mistake: Season 2, episode 6 "Identity Crisis": When Bizarro starts decaying into the parody form of Superman, his costume goes with it; the blue fades, and even the 'S' insignia changes. Strange that superhero garments change right alongside their wearers when they suffer from an unstable genetic effect. Were the clothes cloned right onto his body, instead of sewn?

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.

Weirdmageddon: Part 1 - S2-E18
Continuity mistake: Two guys are throwing a frisbee and it lands on the ground. In the next shot, the frisbee is gone.

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.

Revenge of the Monsters - S1-E38
Continuity mistake: The episode is about Ty being put on trial for his attacks as the Wirewolf in the episode of the same name. The problem is that "Revenge of the Monsters" is a Season One episode and the episode "Wirewolf" didn't appear until Season Two.
Suggested correction: "Wirewolf" originally aired on October 28, 2000 while "Revenge of the Monsters" originally aired on November 14, 2000. In the context of the show, there's no continuity mistake. When they reordered the show and put them into Season 1 and Season 2, the first 7 episodes of season 2 are out of order (according to original air date). For example, s02e01 aired after s01e14.
Even though "Revenge of the Monsters" aired on November 14, 2000, and as a season one episode, the episode "Wirewolf" is a Season two episode so it still constitutes as a continuity error.
No. You missed the point completely. "Wirewolf" was produced BEFORE (production code 011) "Revenge of the Monsters" (production code 045). Therefore, there is no continuity error for the show. The order of the episodes were then later changed, which isn't the fault of the show. If you watch the episodes in order they were produced instead of the order they're listed in IMDB, there isn't a mistake.

Coffee Quest/Phoenix Rises - S1-E18
Other mistake: In Phoenix Rises, when Phoenix runs away, the Big Coffee sign is missing.

Plot hole: In each episode, Emmy, and Max travel to dragon land (often for a long time) without their parents ever knowing. This makes no sense. Their parents would notice sooner, or later that Max, and Emmy always go in, and out of the house, or that it's always quiet in Emmy, and Max's playroom. You'd think Emmy, and Max's parents would get suspicious, and would question their children accordingly.

Continuity mistake: When Lion-O lands after falling down the crevice after encountering the 3-Eyed monster the ThunderCat Logo on his is a red Lion on a black background, in all other shots it's a black lion on a red background. (00:07:30)

The M.O.D.O.K. That Time Forgot! - S1-E2
Character mistake: M.O.D.O.K. refers to Hoobastank as "the Beatles of the late 90's." Hoobastank only released one album in the 90's, and they didn't become popular until after they released their second album in 2001.

Winning Through Intimidation - S1-E15
Continuity mistake: Panik's Metal Guardian can be seen on the field several minutes before he actually plays it. (00:10:30 - 00:13:00)

Continuity mistake: Chris says he is handing Heather the final marshmallow of the night. When the shot changes for Heather to yell at the rest of the team, Chris is holding a full plate of marshmallows.

Continuity mistake: I know that Animators re-use backgrounds but it is painfully obvious that when Keitaro and Narusegawa are leaving the exam results posting they walk in a straight line past the same "Ristorante" three times.

Twilight of the Apprentice - S2-E20
Continuity mistake: Near the end, when Ahsoka runs at Vader, for a split second when he turns around, the part of his mask yet to be sliced off is already missing.

Continuity mistake: In the episode where Fester invents a fabric: When Fester lies down on the parking lot, his head is first pointing upwards, towards a car, then in the next shot he has turned 90 degrees and his head is pointing towards Norman's legs.

Continuity mistake: When JoJo is eating the steak the first time, in close-up the juices have overflown the plate, but in the next shot there's no such mess on the tablecloth. Moreover, you can see him cut the last piece in half, and then pick it up whole. (00:02:50)

Continuity mistake: When Wolverine is bidding farewell to the family, he is directly facing them. When the shot changes, he is standing perpendicular to them with his left side facing them. (00:20:55)