Yu-Gi-Oh GX Duel Academy GBA - Event Revenge the Obeliks Blue

After getting their butts kicked by Jaden for the umpteenth time, Manjome's (Chazz's) lackeys, Topher and Conklin, will ask you to get your game on with Jaden and give him a primo butt kicking for them. If you accept their request, they'll give you some cards. Card reward: X-Head Cannon, Y-Dragon Head, Z-Metal Tank