The Alien Spaceship.

The Alien Spaceship appeared at the very end of "The Eds are Coming" where it is seen pulling the Cul-de-Sac with a clump of earth into space. It's an almost exact recreation of the saucer from Jimmy's nightmare (seen at the beginning of the episode). The alien spaceship also appeared in the other episodes of the Cartoon Network Invaded mini-series. This event is non-canon for two reasons: firstly, the episode was part of an ongoing saga (CN Invaded) and secondly because the episode itself is not considered canon for the aforementioned reason.

Appearances throughout Cartoon Network Invaded

Foster's Home for Imaginary Friends

Here, it was only seen at the end of the episode, descending down upon the unnamed town in which the series was set. It came after Bloo's claims of having "enough Cheese for all aliens" summoned it. As it descended, the word "cheese" was heard coming from the ship.

Ed, Edd n Eddy

The spaceship was first seen in Jimmy's dream, hovering above the Cul-de-Sac as it abducted part of it. It was later seen at the end of the episode, carrying the cul-de-sac away into space. No reason for this abduction was given, as the aliens continued their hunt and quite probably did not find what they were looking for.

My Gym Partner's a Monkey

The spaceship did not appear here, although the "travel pods" extensively used in the next two episodes did appear. Strangely, the one Rick Platypus pilots at the end of the episode is purple rather than pink; in the other two episodes, the pods are pink. Also, the pod he uses is shaped like a small, conventional UFO (as is the spaceship itself). This, coupled with the fact that he never mentions cheese, instead talking about "brain juice", suggests that he is part of another, unrelated invasion.

Camp Lazlo

This episode was notable in that it showed the inside of the spaceship–and the aliens–for the first time. The inside is composed of a central dome where entrances and exits are conducted, with computer monitoring boards and a steering system around the edges of the flying saucer. The spaceship never touched down. Instead, the aliens used their round, pink pods to float down to earth. Throughout the episode, the ship hovered over Leaky Lake, first on the Camp Kidney side, and then (after the cheese was stolen by Canadians) on the Acorn Flats side.

The Grim Adventures of Billy and Mandy

The spaceship was seen for the final time here. It was revealed that it was part of a fleet of ships manned by the moon dwellers. The reason that the aliens were after cheese was that they continually built and destroyed the moon with it.