In N.U.G.G.E.T. when Numbuh 4 dippes the DCFDTL we see Numbuhs 3 and 5 closing their eyes from behind the window.In the same scene Numbuh 3's dress isn't green but purple.
The Macarroni art special has a clone on "Tripping the Rift" for clownza, Wich has CatDog, House of Mouse, & Yoshi Story spoofs.
When the group is standing in front of Numbuh 3 and Numbuh 2 is saying "It's a disaster!", Numbuh 2's goggles rim was grey.
Numbuh 3 goes into the museum unarmed. Even though that is soon rectified, even she should have known better.
While Numbuh 1 is speaking to Numbuh 15, Closed Caption refers to Numbuh 1's Sector as 'Sector E.'
Numbuh3: (After the rainbow monkey Lisa brakes) AHHHHHHHHHHHHH!
Mr.Boss: (runs into the fight) Run away like little girls!!!
(The S.C.A.M.P.E.R. crashes)
Numbuh 2: I told you not to touch that!!
Numbuh 13: Well SOR-RY!! Geez, you guys are pushier than Sector N!
(Numbuh 2 accidentally wrecks a piece of art)
Numbuh 5: Numbuh 2, we're supposed to be saving the art!
(Numbuh 5 also accidentally destorys a piece of art)
Numbuh 2: You're one to talk!
Toilenator: Goody! You recaptured Numbuh 13. Hooray for us!
Mr. Boss: Oh, shut up, Toilenator!!
Count Spankulot: (Upset) What is the idea that is so big? Where is the macarroni?! I came for macarroni!
Knightbrace: (Just as upset) Yeah! How can I brush after a meal if I haven't eaten anything?!
Numbuh 4: 1... 14... 17... Q!
Among the villains seen at Mr. Boss' Macaroni Dinner are Mega Mom and Destructo Dad, Stickybeard, Gramma Stuffum, Miss Goodwall, Crazy Old Cat Lady, a Cheese Ninja, Terrible Tutor, Count Spankulot, Knightbrace, Mr. Wink and Mr. Fibb, Common Cold, Mr. Fizz, Toilenator, Great Lenny Puttinski, Chester, Cuppa Joe, the Coffee Cup Guy from Operation: F.L.U.S.H., an unknown fishbowl-helmeted villain, and an unknown villain in a chameleon suit.
N.U.G.G.E.T. is a Numbuh4 episode, while M.A.C.A.R.R.O.N.I. is a team a episode, eventhough is kinda revolves around Numbuh3 towards the end
Villains: The Delightful Children from Down the Lane, the Chicken Men, Toilenator, Mr. Boss, and the Ice-Cream Men
In N.U.G.G.E.T. the delightful children are sharing the same belt.
Look Hard: In the musical number, one of the ad signs says "Mr. Warburton's Elxter." Mr. Warburton is the creator of the show.
Proving a rumor wrong: Numbuh 4 isn't from Liverpool, he's from Australia. Operation: N.U.G.G.E.T. marks the 4th piece of proof.
Operation: R.O.B.B.E.R.S. quote:
Numbuh 5: The word four is not spelled with a q.
Numbuh 4: It is in AUSTRALIA!
Operation: S.P.R.O.U.T. quote:
Numbuh 4: Mom, may I be excused?
Numbuh 4's Mom: Why of course my little MARSUPIAL! (marsupial is a type of animal, many of which are found in Australia)
Operation: N.U.G.G.E.T. quote:
Numbuh 4: You don't have to swim it MATE.
Again, Operation: N.U.G.G.E.T. quote:
Numbuh 4: I'll give you till the count of Q (linked to Operation: R.O.B.B.E.R.S.)
This is (I believe) the first time that any member of the core team has ever been able to physically injure the Delightful Children (as opposed to them goofing up and doing themselves in).
Operative Debut: Numbuh 13, Numbuh 11 (Replaced Cree), Numbuh 15, and Numbuh 14. Since there are usually 5 operatives in each sector, it is possible ex-operative Numbuh 12 (Operation S.L.U.M.B.E.R.) was apart of Sector N. It appears that these operatives are from Texas.
In M.A.C.A.R.R.O.N.I., the KND trade Toilenator back to the adults in exchange for Numbuh 13. Numbuh 1 mentions that they captured Toilenator after he tried to invade the Treehouse. Numbuh 1 might've been referring to episode F.L.U.S.H.
Credits: Numbuhs 2 & 4 playing video games while Numbuh 3 talks about Operation: M.A.C.C.A.R.O.N.I.
Lizzie's cameo in Operation: N.U.G.G.E.T. marks her first season 4 appearance.
When the Rainbow Monkey Lisa is destroyed, Numbuh 5 comforts Numbuh 3 by saying that she'll make another one. Was she the artist who "painted" the original? If so, Numbuh 5 must be fond of Rainbow Monkeys...
In N.U.G.G.E.T., one of the patrons of the saloon (the one who tried - and failed - to steal Numbuh 4's nugget) is one of the bandits from R.O.B.B.E.R.S.
Fourth appearance of Mushi.
It is fitting that in M.A.C.A.R.R.O.N.I. the operative's Numbuh is 13; he's a jinx, and 13 is an unlucky number.
In this episode, we discover that the KND use the mall as a "neutral zone" when they must deal with adults.
N.U.G.G.E.T. stands for Numbuh Uncovers Golden Glistening Edible Treat; M.A.C.A.R.R.O.N.I. stands for Museum's Artwork Cruelly And Recklessly Ripped Off Nearly Impossibly.
In N.U.G.G.E.T., not only does Lenny of the DCFDTL wear a cowboy hat on top of his helmet, but the helmet itself has white stars on either side.
I've noticed that we've seen Numbuh 11, ex-operative Cree, in lots of episodes. And we've also seen Numbuh 12 in Operation: S.L.U.M.B.E.R., just as she too betrays the KND. Now, we see Numbuh 13, and if the pattern continues, he/she won't be in the Kids Next Door for long.
Bad Shows:Number 13's voice is a parody to 2 pannial Crap fest:CatDog & House of Mouse
Operation: N.U.G.G.E.T.: Nugget Rush
This is excatcly like the old west, and the California Gold Rush in 1849.
Macarroni Art: Real-Life References
Much of the Macarroni Art resembles real works of art, such as The Thinker, Whistler's Mother, Henry del'Giudice's mobiles, and of course, the Mona Lisa.