Kod Lyoko Sezon 1 Odcinek 12: Swarming Attack

Sissi, the school's babe-in-waiting, plucks up the courage to tell Ulrich she has a crush on him. Far from being flattered, Ulrich bursts out laughing, hurting Sissi's feelings. Determined not to be the fool in this situation, Sissi decides to get her own back by stirring up trouble between Ulrich and Yumi. While all this is going on, the X.A.N.A super-calculator has found a new way to attack our planet...