Basic Yin-stinct / Fighting Fooberty

S2 E11: Basic Yin-stinct: Taking Yin's self-assuredness as arrogance, Sarcastico feeds Yin a watermelon full of "seeds of doubt" which make her doubt herself. Doubting her instincts at every turn in and out of battle, Yang finds that he must be the brains of the team - which gets them clobbered at every turn. Can Yang get Yin to regain her confidence before it's too late?