zenee

The Secret Box / Band Geeks - S2-E14

Continuity mistake: When SpongeBob is sneaking to Patrick's house, Squidwards house is missing.

Arrgh! / Rock Bottom - S1-E17

Revealing mistake: Near the end of "Rock Bottom", when SpongeBob arrives back to Bikini Bottom, SpongeBob's pineapple is animated differently from the other buildings. It looks like it was cheaply tacked on in post production.

Nikolai

Love and Cheese / Weighing Harold - S4-E7

Continuity mistake: Lila was pretty much entirely underwater in a "standing" position when Arnold rescued her, how come suddenly the water only reached her knees?

AidanN

Arnold's Hat/Stoop Kid - S1-E3

Continuity mistake: When Grandpa is telling Arnold about how how he tried to cover his head when his hair falls out, the camera cuts back to him with his arm on Arnold's shoulder and Arnold has his hat on, even though the whole story is about him losing his hat.

Show generally

Continuity mistake: When the four boys form their line (just before the adults call out "Arnold"), watch Harold's tooth; it goes from the right side of his mouth (as you look at him) to his left side.

AidanN

Yakko's World - S1-E7

Other mistake: At the start of the song, Iceland appears twice on the map, and in two different colors. Also, a large portion of Antarctica is cut off.

thezombiewolfgirl

Arrgh! / Rock Bottom - S1-E17

Revealing mistake: At the beginning of Rock Bottom, when the bus pulls up in front of Patrick and SpongeBob, right before Patrick steps up onto the bus, SpongeBob's right arm is missing and it suddenly appears as he starts moving.

Help Wanted / Reef Blowers / Tea at the Treedome - S1-E2

Revealing mistake: In the shot where Spongebob says, "That little squirrel is in trouble, " half of his belt is missing.

Dying For Pie / Imitation Krabs - S2-E6

Revealing mistake: In the episode "Dying For Pie", you can see Mr. Krabs' legs disappear when Squidward says, "But you can't pay me enough to act brotherly on that guy!" Also, Squidward is standing on 2 tentacles instead of 4.

rein856

Mermaid Man and Barnacle Boy IV / Doing Time - S3-E1

Other mistake: When the citizens pop out of Sponge Bob's holes near the end of Mermaid Man and Barnacle Boy 4, if you look closely, Sandy's head is gone except her eyes and nose.

thezombiewolfgirl

Best Day Ever/The Gift of Gum - S4-E20

Revealing mistake: When Squidward says "I suppose if you haven't fixed my clarinet, the concert would have been a bust", Sandy's tail is the same color as her suit.

Help Wanted / Reef Blowers / Tea at the Treedome - S1-E2

Revealing mistake: When Spongebob uses his binoculars, his teeth turn yellow for one frame.

Sleepy Time / Suds - S1-E15

Revealing mistake: After SpongeBob disguises himself as Patrick's rock and right before he sneezes his uvula clips through his bottom lip.

Girl Trouble / School Dance - S3-E18

Continuity mistake: Besides the fact that when Helga is sharpening her pencil, the desk arrangement changes, one of the students visible when she looks at Arnold is... Helga. This happens because the shot is taken from the episode "Helga's Love Potion."

Weird Cousin / Baby Oskar - S4-E11

Other mistake: Stephen Viksten is credited twice for voicing Oskar.

AidanN