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
Other mistake: When Princess Toadstool changes Mario back to normal, Mario's cap can be seen before he transforms. (00:10:42)
Other mistake: When Mario and Princess Toadstool enter the dungeon, the hatch they enter through briefly appears closed, but they still enter it regardless. (00:04:16)
Reign Storm - S1-E7
Other mistake: When King Koopa places the Bob-omb, part of the background is coloured in like its key. (00:03:20)
Reign Storm - S1-E7
Other mistake: When Luigi says there is more trouble in the Mushroom Kingdom than they can handle, he places and gets some paper from under others without affecting the ones on top. (00:03:58)
Toddler Terrors of Time Travel - S1-E8
Other mistake: When King Koopa takes the wheel, his hand is resting in midair. In the same shot, Kooky's time machine disappears. (00:02:46)
Other mistake: In several shots during the match, the wrestlers appear to be outside of the ring, but the ropes make them appear as though they are inside it. (00:08:07 - 00:11:00)
Misadventures in Babysitting - S1-E13
Other mistake: When Junior is thrown into the pipe, his shirt is drawn backwards. (00:06:48)
A Toadally Magical Adventure - S1-E14
Other mistake: When Bully uses the wand, the fence around Toad's house can still be normal-sized despite Kootie Pie having enlarged it. (00:08:32)
Other mistake: When Mario is breaking some Blocks to find some Super Leaves, some of them remain intact. (00:03:42)
Other mistake: When the Doom Dancer starts heading towards King Koopa, and when it falls to the ground, it appears to be heading towards the floor of the Doomship instead. (00:10:53 - 00:11:30)
Mush-Rumors - S1-E17
Other mistake: When Bud says the shotry is amazing, the background appears to be moving backward. (00:01:24)
Crimes R Us - S1-E19
Other mistake: When the Doomship attacks the prison, the sky is that of the Mushroom Kingdom instead of the real world. (00:01:15)
Crimes R Us - S1-E19
Other mistake: After the Mario Bros. realise that they have to stop the bank robbery, two Cheatsys can be seen. (00:03:57)
Crimes R Us - S1-E19
Other mistake: When the Mario Bros. are suspicious of Clyde, the background is the treasury instead of the dungeon. (00:10:25)
Life's Ruff - S1-E20
Other mistake: When Hip tosses the wand to Hop, part of the background is coloured in like Hop's head. (00:02:43)
Life's Ruff - S1-E20
Other mistake: Despite Hip peeking from the girder, he cannot be seen behind them. This also happens to Hop shortly after when they are pulling the astronauts behind there. (00:09:06)
Other mistake: When Emperor Ed falls out of the Doomship, he falls through a closed window. (00:02:49)
Other mistake: King Koopa is able to stick himself out of one of the windows on the Doomship, despite it being closed. (00:08:52)
7 Continents for 7 Koopas - S1-E22
Other mistake: When the Koopa Klogger is destroyed, the background is that of the Mushroom Kingdom instead of the real world. In the same shot, a blue parachute falls to the ground, but when Princess Toadstool picks it up, it turns brown. (00:09:25)