So, even though the Eds made cameos on The Grim Adventures of the KND, the graphic for Eddy popping out of the Mandy Reaper was drawned and done by Yeson Entertainment or Rough Draft Korea?

It’s 1 drawing that zips by very fast, it would be a waste of time/money to get a different studio involved, so I think that would definitely be Rough Draft Korea, if that’s who handled KND’s animation (I believe I recall their animation team was dominant for the special rather than Billy and Mandy’s).

Also, if you look at the Eddy, it’s plain to see this is a very off-model Eddy that had no input from AKA. His hands are huge and lumpy, his mouth is hardly a beak at all, his legs are way too defined and the bumps on the bottom of his sneakers are only existent as part of the wobbly outline. Even the pupil placement seems kinda weird for EEnE style, characters don’t usually look way off to the side when they could easily turn their heads and look directly at something, why didn’t they just make him technically cross-eyed like he usually looks? 

I’m extra nitpicky because I struggled to find that screencap, lol, but yeah, this scene definitely looks to be a KND-drawn Eddy, just like the GAOBAM-drawn Ed in Billy and Mandy Moon the Moon (Ending 1):