- Chinese title: "Shengri Kuaile" (生日快乐)
English title: "Happy Birthday"
It's Wolffy's birthday, but it seems everyone's forgotten about it.
This episode contains the following tropes:
- Birthday Episode: For Wolffy, who mentions that he's somewhere around 30 years old.
- Birthday Party Goes Wrong: Ironically, Wolffy ruins his own birthday party. He sees the other wolves in Wolf Castle, thinks they're having fun without him, and proceeds to crash the event, not realizing until afterwards that that was his party.
- Breaking the Fourth Wall: Wolffy looks into the camera, pointing at the frog who has told him that it's never had anyone to celebrate its birthday with, and tells the audience that he can't just stand around and do nothing since the frog is clearly in misery over its situation.
- Flipping the Table: When Wolffy gets angry at the wolves having a party without him, among the things he does is flipping over the table with the cake on it.
- Happy Birthday to You!: The song is sung throughout the episode by numerous animals, driving home how lonely Wolffy feels that nobody is singing the song for him.
- Not-So-Forgotten Birthday: Wolffy has his birthday seemingly ignored to the point where he thinks the other wolves have forgotten his special day. He doesn't find out otherwise until the end of the episode, when he trashes an event at Wolf Castle that turns out to be his own birthday party.
- Surprise Party: The other wolves have set up a surprise party for Wolffy in Wolf Castle at the end of the episode, but Wolffy has grown so tired of having had his birthday ignored by then that he ruins it for himself, completely not realizing the event was for him until after the fact.
