Code Lyoko

Attack of the Zombies (2x14)

:

When Xana possesses Kiwi, it turns the little dog into the carrier for a virulent virus that turns those it infects into zombies. Aelita and Jeremie are stuck in the cafeteria and Odd is a zombie himself. Jeremie and Aelita escape but Ulrich and the other students fight the rest.