The Grim Adventures Of Billy And Mandy Easter Eggs

In the episode when Billy breaks his dad's motorcycle and Grimm fixes it and it has crazy effects on the world when Billy dives into the water, check out the clouds in the alligator's home: flowers! Just like in Spongebob Squarepants.

In the episode were Scar is looking for a new job in the employment office, the girl she is talking to is the girl of the comedy show "Little Britain" and is saying the same thing that the girl says. "Computer says no!!" is what she says.

I realized this on one of the episodes of the Grim Adventures of Billy and Mandy. It's on a lot of episodes, though. Anyways, there's a huge billboard behind Mandy's house with Ms. Keane on it from The Powerpuff Girls.

on the episode tricycle of terror when sperg throws billy's tricycle off a cliff you'll notice he says "this is where the sidewalk ends!". that is a name of a book. and also the book has the same front cover from this scene except for sperg

On the episode "The Secret Snake Club vs P.E", when they say the secret chant to summon the snake (The "Destroyer") They use lyrics from the Monkees song "Daydream Believer"

On the episode were Hausdocato teaches underworld seniors to fight look at the board. Going down it says poop. On Spongebob training episode poop means people order our patties. I think in Billy and Mandy it means power observation offence and protection.