Kung Fu Panda: Legends of Awesomeness (2011)

S3E12 Crazy Little Ling Called Love

Po becomes wary when Shifu rekindles his romance with his former girlfriend, the villainous Mei Ling. As he navigates his concerns about her influence, he questions the validity of their relationship. Po’s protective instincts kick in, leading him to confront his master about the potential dangers of Mei Ling's return. As he delves deeper into the situation, Po aims to uncover the truth behind Shifu’s feelings and the real intentions of Mei Ling, all while trying to protect his beloved mentor from falling back into old, destructive patterns.