The Fungies! (2020)

S3E17 Mifflin's Replacement

Nevin's new kitten quickly becomes the center of attention, overshadowing his older cat, Mifflin. However, when Seth uncovers that the kitten is actually a miniature Fungie burglar in disguise, the situation takes a turn. It falls to Mifflin to spring into action, confronting the little thief to protect Seth and reclaim the spotlight for himself.