Other mistake: When Mario is breaking some Blocks to find some Super Leaves, some of them remain intact. (00:03:42)
Continuity mistake: When Cheatsy is relieved, Big Mouth's purple eyelids turn grey like his head. This also happens when King Koopa tells the Koopalings that the Dry Bones will show them where Mario and his friends went. (00:02:43)
Continuity mistake: When King Koopa explains to the Koopalings what he actually said, his yellow eyes turn white. (00:02:39)
Continuity mistake: When Mario asks Luigi if he wants King Koopa to know that they and their friends are in Dark Land, his brown hair turns black. This also happens when he and his friends start marching, and when he puts putty in his ears. (00:02:08 - 00:10:32)
Continuity mistake: When the Warp Pipe appears in Dark Land, Mario and his friends appear, but in the next shot, they and the pipe are replaced by a Dry Bones. (00:02:02)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Other mistake: When Princess Toadstool changes Mario back to normal, Mario's cap can be seen before he transforms. (00:10:42)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Revealing mistake: When Luigi changes Prince Hugo back to normal, the light around Prince Hugo is misplaced. (00:10:01)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When the Koopalings run away from Mario, Bully's cream snout turns orange like his body. In the same shot, Big Mouth's purple shell turns green like Cheatsy's, while the yellow rim turns white. (00:09:54)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When King Koopa uses a wand on Mario, it is green, but when Mario transforms, it turns purple. (00:09:16)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When Mario hides behind King Koopa's throne, his black hair turns red, like his cap. (00:08:09)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Other mistake: When Cheatsy and Kooky suggest the kingdoms the Koopalings should take over next, their nostrils disappear. (00:08:18)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When Mario sneaks over to the cage, the number of fingers he has on each hand changes from five to four. (00:07:48)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When Kooky says the Koopalings should go back to Kastle Koopa, his green shell turns orange. (00:06:33)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Revealing mistake: When Big Mouth and Bully start running towards Mario, Bully appears to briefly be running in midair. (00:06:06)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When the Piranha Plant bites Mario, Mario's raccoon tail changes from brown and black to red and cream, while his brown raccoon ears turn red like his cap. In the same shot, the Piranha Plant's tongue changes from yellow to pink. In the same shot, when Raccoon Mario turns back into his normal form, he still has raccoon ears for a short time. (00:05:02)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Revealing mistake: When King Koopa says he is going to turn Prince Hugo into a poodle, his eyes are layered over his snout. (00:01:36)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When King Koopa calls for a family meeting, Bully and Kooky's cream snouts turn orange like their bodies. (00:00:45)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When King Koopa is walking over to the Goombas, the orange spikes on his shell and shackles turn white. (00:00:56)
Sneaky Lying Cheating Giant Ninja Koopas - S1-E2
Continuity mistake: When the Koopalings break into Prince Hugo's castle, Kooky's green head turns orange like his body, while Cheatsy's yellow underbelly turns white. (00:04:15)
Misadventure of Mighty Plumber - S1-E12
Continuity mistake: When King Koopa tells Mighty Plumber to break into the treasury, the white spikes on his tail turn orange. This also happens when the vault starts filling with water. (00:08:55 - 00:09:20)