Grim Adventures Of Billy And Mandy (the) Easter Egg - Spongebob!

In the episode where Fred Fred Burger wins the contest to spend a day with grim, go to the part where the boss of the laxitives company is saying what a bad job grim is doing. When he asks Who is responsible for giving Grim the job, watch the little blue creature that sinks down. He looks like a little blue, demon spongebob!