I remember when Cartoon Network always did these crossovers and cameos where you have Scooby-Doo in Johnny Bravo or have Ed, Edd, and Eddy, as well Kids Next Door being in the same episode of Grim's Adventure that made these shows worth watching.
Also ironic because she did smile in an earlier episode, I especially remember the moment early on where Grim's mother was a genie and she wished everyone to go away and she was all "Perfect" and smiled.
As great as this scene is, it always bothered me because in the pilot episode of Billy and Mandy, we see Mandy smile on more than one occasion. Why didn't the fabric of reality tear at the seams then? Why didn't Grim Billy and Mandy wake up as the Powerpuff Girls in the pilot?
Me thinking that there was a Disney movie with frogs that come out in 2009 when amphibia came out: hold on I think I know what frog movie came out it was called the princess and the frog that can’t break reality right 0:38 I was wrong