Code Lyoko - Season 4 Episode 14
Bragging Rights

Having failed to destroy X.A.N.A.s supercomputer in the Amazon, the group sets out to finish the job. Meanwhile, Odds bragging gets the better of him, and he makes a bet with Ulrich not to brag for 24 hours. However, circumstances conspire to constantly put him in the spotlight, and when he ultimately both defeats William single-handedly and destroys the supercomputer in the real world, Odd becomes convinced that being a braggart is something he can be proud of.