Looking for an episode of a children's TV series. ,,Brain Burger"

[u/Idont9main1cho1]

Hello,

For at least 10 years, I've had an episode of a TV series stuck in my head. This episode is about a zombie apocalypse. I don't remember which series it was, because over time my brain has conflated several characters from different series. For one, there was Mojo Jojo from Powerpuff Girls, he rode on a zombified dolphin, however, there was also a zombified soos Ramirez from Gravity Falls one there, He sang a song, and incidentally, he sang a song about these brain burgers. The song goes something like this: "Brain burgers are good for you, brain burgers are good for you, you, you and me," (That was translated from German, as I remember it) and it's possible that Dipper and Mabel wanted to run away from them. But At the same time, I also remember Phineas and Ferb, who also tried to stop the apocalypse (but I'm not at all sure if Phineas and Ferb were really there). Furthermore, the game showed how to reach the zombie island in first-person perspective, which was only connected to the mainland by a bridge.

I really hope someone can find this for me, because a few people said I must have just dreamed it, and Chat Gpt and Google couldn't find anything about it either.