League Finals! Full Battle 6 vs 6!! - S5-E60
Continuity mistake: When Ash and Brock are at a table, the front Ash's hat is red, and the back is white, but in the next shot, the front of it is white, and the back is red. (00:09:28)
Continuity mistake: When Silver Surfer is engulfed by the Fractite, he is standing on the middle of his board with his left foot closest to the front (the "goofy" stance), knees slightly bent and arms extended to his side with his elbows slightly bent. In the next scene, he is shown to have both of his feet pointed towards the front of his board, with his knees bent more and his torso leaning back. The Fractite holds him in place, similar to if you were frozen in ice, so he wouldn't have been able to freely move.
Revealing mistake: When Pablo as the ping pong bandit takes Tyrone's paddle, Tyrone asks if he can play Pablo again so can get his paddle back. When Pablo walks into the frame, his skin clips out of his coat. This also happens when he does the "Bandit Slammit".
Buttercrush / Fuzzy Logic - S1-E4
Continuity mistake: When Buttercup punches a hole in the wall to see her sisters are being lowered into lava, the hole's initially quite small. In the next shot, the hole is noticeably bigger.