Until seeing the whole invaded series i didn't really get what this episode had to do with the special invaded thing.
In the ed edd and eddy the only thing revealed is the spaceships and the gym partner episode it only reavels what they look like. the only real episode where the last two which showed the aliens intentions. When i saw the first three i thought theyd all be diffrent but when the Lazlo one went on i was surprised to see they where all conected together to make up the whole thing. I lauged at the special ending of grim because of the KNDs reapperance.