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)
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)
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)