Code Lyoko - Season 1 Episode 24 -

After battle against X.A.N.A. Ulrich, Odd, and Yumi are nowhere to be found. They, however, do not see anything wrong with where they are. X.A.N.A. has trapped them in a world of its own design, which is fashioned after the school to ease their suspicions. However, the world that Ulrich, Odd, and Yumi are in appears to have some glitches in it. Jeremie virtualizes himself into that world to save the others.