X-Men: Evolution (2000)

Mainstream - S3-E3

Continuity mistake: When Kitty goes to get a midnight snack, her hair is down. But a few shots later, her hair is up in a ponytail.

Phoebe

Retreat - S2-E12

Trivia: When one of the Bigfoot hunters talks about his whistle, he says to go to the Bigfoot shop and ask for Mulder. Mulder is the Agent from The X-Files (X-Files music plays in the background when he says this).

Piemanmoo