In Codename Kids Next Door, in Operation A.R.C.H.I.E.V.E, we learn that Sector V lives in Cleveland, Ohio. In The Grim Adventures of Billy and Mandy in Jeffy's Web, we learn that Endsville lives somewhere in New York, judging by the Statue of Liberty as seen in that episode. If they live in different states apart, then how come some characters from Cleveland showed up in New York? We see Tommy Gilligan, Numbuh 2's brother, in Endsville, and there was no explanation as to how he got there, whatsoever.
In Billy and Mandy's Big Boogey Adventure, Numbuh 3 promised to get back in Grim, but when Grim is captured, they don't even remember each other or the events of the TV movie. Reponse: To be fair, Numbuh 3 may have forgotten about it (she is somewhat ignorant) and Grim just didn't care.
The first five minutes of the movie, Ben 10: Race Against Time, were featured during the final commercial break.
Billy: DAD'S PANTS! What do I do?! Dad would sell my organs if he finds out I ripped his lucky pants! (squinting his eyes) There's only one group of kids who can help me now...
(Scene to where we see the Eds from Ed, Edd, 'n' Eddy. Billy calls the Eds and Eddy answers it)
Eddy: Ed, Edd, and Eddy's Pesky Problem Fixers! Got a problem that's pesky? We'll fix her for just one lousy quarter!
(Eddy then looks annoyed as Billy talks on the other line)
Eddy: WHAT DO YOU MEAN YOU'RE BROKE!? (Ed and Edd crashed to the ground) Hey! If you're looking for charity, call Kids Next Door! They're cheap!
(Eddy hangs up)
Computer Voice: Mandy New Dictator Manned Robot: Monkeys And Nice Doggies Relax On Bodies of Turtles.
Mandy: (furiously) What kind of acronym is that?
Numbuh 3: Well, if you weren't in such a rush, maybe I would have come up with a better one!
Fred Fredburger: Um, can I come out of the TV? I gotta poo-poo.
Mandy: I want her found a locked up yesterday.
Numbuh 4: Aw, I had plans that day.
Billy: Hey, You're not the Powerpuff Girls!
Numbuh 4: Ah crud, what is Billy doing?
Numbuh 5: Challenging you for fool of the month!
Numbuh 2: Uh, Numbuh 5, do you think it was a good idea to leave Billy alone in the ship?
Numbuh 5: Do you want to go back and stay with him?
Numbuh 2: Good point.
Billy's fancy pants are seen again in this episode.
This is a crossover of many shows, but Codename: Kids Next Door made the main crossover.
According to Numbuh 1, we learned that none of the KND operatives comes to Endsville, due to some strange stuff going in that town, lately.
Look Hard: After the Delightful Reaper is defeated, it explodes and all the people come out. You'll see the Powerpuff Girls, Ed, Edd n' Eddy, Adam from My Gym Partner's a Monkey, Goo, Mac from Foster's Home For Imaginary Friends, Dexter, Dee Dee, Mandark, from Dexter's Laboratory and Andy from Squirrel Boy pop out.
This is the second time that Mandy was absorbed by a stronger foe and took over since The Rock of Horror.
Mandy tortures Numbuh 1 with Fred Fredburger's constant talking.
Credits: Some "what if" crossovers of some Cartoon Network shows.
1) The Grim Adventures of Billy and Mandy + Ed, Edd n' Eddy = Ed, Edd n' Mandy
2) Evil Con Carne + Camp Lazlo = Evil Carne Lazlo
3) Class of 3000 + Codename: Kids Next Door = Class of Numbuh 3000
4) My Gym Partner's a Monkey + Dexter's Lab = My Gym Partner's a Mandark
5) Samurai Jack + Foster's Home for Imaginary Friends = Samurai Mac
For the first time ever, Mandy does not win and gets what she wants.
The show ends with "end trasmission" tag like it does in every single episode of Codename: Kids Next Door.
Dora from Pandora's Lunch Box is one of the girls who is fighting which stuffed animal is better. This marks her third appearance.
Billy's Dad helps save the day.
The Powerpuff Girls are mentioned in this episode.
Mandy takes over the Kids Next Door and renames it as "Mandy New Dictator".
Ed, Edd n' Eddy are to make a cameo appearance at the beginning.
This episode is not truly the finale (although it will air last). Wrath of the Spider Queen is the series finale episode.
This is a crossover special of "Codename: Kids Next Door" and "The Grim Adventures of Billy & Mandy."
Fred Fredburger: I like shows with monkeys... monkeys that go to camp, and also imaginary friends...
This is a reference to two different Cartoon Network series, Camp Lazlo and Fosters Home for Imaginary Friends.
Mandy: And I would have gotten away with it if wasn't for you meddling Kids Next Door.
This is a reference to the villains from the Scooby-Doo series.