The Grim Adventures of Billy and Mandy (2001)

S5E2 One Crazy Summoner

After Billy's parents are attacked by an enormous anaconda, he proposes seeking the help of boy wizard Nigel Planter, who is believed to have a knack for communicating with snakes. However, it turns out that Planter can only converse with snacks. Instead of helping with the snake situation, he enlists the aid of Billy, Mandy, and Grim to win over the enchanting witch Huffefnie Pfefferpfeffer at the School of Sorcery, who bears a striking resemblance to Gladys. Despite his attempts with a magical love potion and enchanted chocolates, nothing goes as planned, and they all forget about Billy's parents.