Bakugan Battle Brawlers — S1 E4 - Red Bonds

Dan has a hard time adjusting to life without Drago. He ends up causing a schoolmate named Ryo to drop his computer and runs away, hurting Ryo’s feelings. Masquerade takes advantage of Ryo’s hurt feelings, and Ryo beats Dan in a battle. Dan finds Drago, and tries to make up with Ryo.