Billy & Mandy Moon the Moon (The Grim Adventures of Billy & Mandy)

"Billy & Mandy Moon the Moon" is the eighth episode in the sixth season of The Grim Adventures of Billy & Mandy.

Plot
When Billy is sent to bed after playing with his Dr Brainiac action figure, he wishes he had an adventure. He notices a strange light outside and wanders into a corn field to investigate - he encounters Sperg, and both of them got caught by a UFO's tractor beam. Inside the extraterrestrials decide to experiment on him.

Why It Rocks

 * 1) The plot is very cool and impressive, and somewhat serves as a great sequel to the famous season 5 episode "Billy & Mandy vs the Martians". It has Billy and Sperg getting captured by extraterrestrials who experiment on them and then Billy finds out that the aliens are werewolves who want dairy products.
 * 2) The extraterrestrials' designs look impressive and have a bit of CGI touch on them, along with the robot monster they create and the spaceships seen around Endsville and the three-eyed one seen later on. They're more impressive with real monsters coming out of their outfits and when they turn into werewolves and spray cheese.
 * 3) The fight Billy has with one of the extraterrestrials is decent and he somehow beats the monster up in just one punch. He then spanks all three of them. Along with the fight Billy, Mandy and Grim in their dairy costumes start against the alien werewolves.
 * 4) Some continuity is mentioned from the season 3 episode "Super Zero", when Billy said he will be once again the hero that shoots out Heifer Brands Farm Yoghurt. There's also some from "Spider's Little Daddy", with Sperg singing the song he also sang from that episode.
 * 5) Some funny fourth-wall breaks, such as when Grim said "come on people, I need some privacy", which was well-timed as it cut to ad breaks after that. And also when the reader (which was a blackbird) said "tragically, during the last commercial break" when it was back to the show.
 * 6) The cheese song the three-eyed monster sings is pretty funny along with Billy, Mandy, Sperg and Grim playing Mexican mariachi music.
 * 7) Billy, Mandy, Sperg and Grim are all likable characters as they try to stop the alien werewolf dairy creatures. What's surprising is that Billy and Mandy got flanderized, but it's not shown here.
 * 8) Billy, Mandy, Sperg and Grim's dairy superhero outfits look pretty cool, especially with Billy using his old yoghurt suit in werewolf form as mentioned above.
 * 9) Good Ending: Grim and Mandy continue to fight the alien werewolves, while Werewolf Billy is with his parents and then the blackbird sprays cheese when he says "nobody cares about what happens to Sir Raven!" Then, we cut to Dr Brainiac getting a special delivery for his birthday, receiving a sweater. But he hates them and the spider says "why can't you just retire?"

The Only Bad Quality

 * 1) Lots of gross-out/toilet humor here, such as when Billy put his Dr Brainiac action figure up his nose along with him having special contents there when he had a packet of chewing gum on his ear and most infamously, when he showed his butt when using a towel to fight the aliens.

Trivia

 * During the end credits, pictures of Camp Lazlo, Foster's Home For Imaginary Friends, My Gym Partner's a Monkey and Ed, Edd, n Eddy can be seen when one of the aliens was showing examples of wedgies.
 * Numbuh 2 (from Codename: Kids Next Door), Ed (from Ed, Edd, n Eddy) and Bloo (from Foster's Home For Imaginary Friends) appear as cameos here but only as cardboard cutouts.