Code Lyoko, Season 1

Jeremy:
Yumi, you're right! It's a trap! Don't go!

X.A.N.A. Jeremy:
X.A.N.A. is that the best you can do? A cheep imitation to delay us?

Jeremy:
He's the one who's lying! He's the phony- it's him! Everything here is phony. You never came back from your last trip. You're in a virtual world created by X.A.N.A.

Yumi:
That would explain all the inconsistencies.

Jeremy:
Of course it would. X.A.N.A. can make mistakes, too. He only has theoretical knowledge of the real world. What he wants is to get you all in the scanner to get rid of you once and for all!