X-Men: Evolution Season 1 Episode 1

Kurt's eyes has pupils this whole episode but during the time the professor was showing Kurt his room, in a closeup of Kurt you can see he does not have pupils.

When Kurt takes the top off the box you see for a split second (while he is taking the top off. Not after) that his holo watch is missing.

When Kurt first puts on his hallo watch it's on his left wrist, but when he puts his fist up in front of the mirror he puts up his right fist and the hallo watch is on that wrist. Also when he puts his fist up he is turned so it looks like he is putting his left fist up,

Throughout the entire series, Toad will have normal skin pigment and bright, green eyes when he is in his street clothes. However, when Toad's in his costume, he will have pale skin and shadow around his eyes with red pupils.

When Toad goes up to Scott in the school hallway, Scott closes his locker door. The door is huge. It's wider than him, and the bottom of the door extends far below his waist. In the next shot (wide), the door is half the size and the bottom is right at his waist. A bit later, the door (all the locker doors, actually) are much much narrower.

Nightcrawler cannot teleport without at least knowing where he is going. How did he get to the Danger Room and then to the Blackbird hanger??

Cyclops mentions that the X-Men's jet, among other things, has three times the firepower of a SR-71, but the SR-71 is an unarmed spy plane.

When Kurt first met Scott and Jean his tail was inside his robe but when he telports his tail is sticking out. Also when he teleports, you see he is wearing his x-men uniform.

When Toad approaches the manor fence, it has iron prongs on the tops of all the rails, yet when he looks up they're gone but when he jumps over they're back.

In the short time he had his hologram on, Kurt's fingers were separated.

After Kurt and Toad teleport into the Danger Room, Kurt is seen without his tail, then with it almost immediately following.