History WesternAnimation / HeyArnoldTheJungleMovie

* DemotedToExtra/TheCameo: Lila despite being one of the supporting characters in Hey Arnold she only appears on the Sunset Arms roof when they everyone was watching Helga's video about Arnold without any lines.

* ChuckCunninghamSyndrome: During the scenes at the boarding house: Ernie, Oskar, and Mr. Hyunh are shown, but Suzie is nowhere to be seen. Craig Bartlett revealed on a Reddit AMA that she divorced Oskar and moved out of the boarding house before the events of this movie.

* InMemoriam: The movie served as a posthumorous tribute to Creator/SteveViksten, the original voice for Oskar Kokoshka and one of the show's writers.

''Hey Arnold!: The Jungle Movie'' is a MadeForTVMovie based on the 1996-2004 animated series ''WesternAnimation/HeyArnold''. The film premiered simultaneously on Creator/{{Nickelodeon}}, Nicktoons and Creator/NickRewind on November 24, 2017, and serves as both the sequel to 2002's ''WesternAnimation/HeyArnoldTheMovie'' and the GrandFinale of the series as a whole.

* SeldomSeenSpecies: Among the animals captured by Lasombra are a quetzal and an emerald tree boa.

* StalkerWithACrush: Helga, as usual. She takes it UpToEleven with hundreds of hours of video footage of Arnold, that she has secretly filmed for years. She even filmed him while she wasn't clearly around in the previous episodes!

** Arnold and his friends meet the most feared and notorious river pirate Lasombra.

* RapunzelHair: The princess of the Green-Eyed People's hair is tied in a ponytail, but it's still long enough to reach her waist.

* StringTheory: The movie begins with photo of Arnold's parents connecting to drawings and newspaper clippings.

* ShoutOut: The movie begins with photo of Arnold's parents connecting to drawings and newspaper clippings.

* StringTheory: The movie begins

* ShoutOut:

''Hey Arnold!: The Jungle Movie'' is a MadeForTVMovie based on the 1996-2004 animated series ''WesternAnimation/HeyArnold''. The film premiered simultaneously on Creator/{{Nickelodeon}}, Nicktoons and Series/NickSplat on November 24, 2017, and serves as both the sequel to 2002's ''WesternAnimation/HeyArnoldTheMovie'' and the GrandFinale of the series as a whole.

* BigDamnMovie: Even bigger than the last one, featuring no less than a trip to the uncharted jungles of San Lorenzo to find the titular character's [[ParentalAbandonment long-lost parents]] while facing a vicious crew of river pirates, and encountering the mysterious Green-Eyed people. Also, [[spoiler:Arnold and Helga finally getting together]].

** [[spoiler: Curly once again releases caged animals just like in “Geek Party," only this animals belong to Lasombra, instead of a zoo.]]

* CompositeCharacter: Arnold's personality changed slightly in the cartoons each time he was given a new voice actor, but ''The Jungle Movie'''s version of Arnold tries to mix and match the best parts of each one, particularly Philip Van Dyke and Spencer Klein's versions. He's back to being (mostly) serious but he's less of a goody-goody (probably because he's too busy with his own plot to meddle in everyone else's) than Klein's take. He has the Van Dyke childlike innocence to him, but also definitely has the most determination of them all. Although freaked out by Helga's advances at first, he eventually comes to terms with them [[spoiler:and reciprocates]], completely dropping the bizarre trolling-flirting combination he briefly employed when Creator/AlexDLinz voiced him. [[spoiler:Despite returning her feelings, he's still more tentative with Helga than Klein's Arnold would have been - letting Helga initiate the kiss instead of kissing her himself.]]

* DarkerAndEdgier: The film is the darkest entry in the franchise, since it involves characters getting into perilous situations where they almost get killed, kidnapping [[spoiler:and the BigBad and his mooks getting killed off on-screen.]] The TV-PG rating is definitely earned here.

* DontExplainTheJoke: Mr. Simmons says to Arnold, "You've gone Benedict, Arnold" and attempts to use that comment as a "teachable moment" to educate his class about the infamous traitor, but it comes off more as this, as evidenced by the class's reaction.

** Helga [[spoiler:finally confesses her love towards Arnold. While this happened before in the previous movie, there, Arnold didn't return her love and pretended it was her just being emotional. Here, it's [[RelationshipUpgrade very much requited]].]]

* HiddenHeartOfGold: Helga, as usual, has both the literal and metaphorical ones; [[spoiler: and both are the key to save the Green Eyes' adults and Arnold's parents after La Corazon (another literal example) is gone]].

* JerkassRealization: After [[spoiler:Arnold breaks down in his cell in Lasombra's camp]], Helga realizes how selfish she was being and decides to help him find his parents just for his sake.

** After Arnold refuses to listen to Helga's second attempt at a LoveConfession (following her first one in ''Hey Arnold! The Movie''), she ''ripped her picture of Arnold to shreds before tossing it and its heart-shaped frame off the back of the boat''. Considering how deep Helga's crush goes, you know Arnold absolutely fucked up to warrant such a reaction. Luckily [[spoiler:Brainy retrieved it and mended it together before returning it to Helga, who is so overjoyed that she kisses him!]]
** The fact that Arnold actually starts ''crying'' (something he never did before in the series) [[spoiler:after the group is imprisoned by Lasombra and it looks like he'll never find out about his parents]] shows just how far past the DespairEventHorizon he is.
* OffScreenTeleportation: One moment, Grandma is in her night dress hearing Abner's distress call, the next, she's dressed in a military uniform driving Grandpa's Packard.

* PottyEmergency: Harold constantly has to use the toilet due to the large amount of food he eats throughout the trip.

** The danger of the Sleeping Sickness. In the series, it was portrayed as being certain death since Stella mentioned the death of the butterflies. In the movie it was changed to causing a coma like state.

** Helga has secretly filmed Arnold for several years, and has a secret room filled with tapes and monitors.

** [[spoiler:Arnold finally discovers Helga's secret gold-plated locket of him (or rather, discovers the locket, which he saw before in an episode, is hers), which finally causes a RelationshipUpgrade. Although she confessed to him before in ''Hey Arnold! The Movie'', the two agreed that ThatDidntHappen. This time, the LoveConfession sticks and is indeed requited.]]

* AmbiguousTimePeriod: The film was updated to be less of a '90s-centric UnintentionalPeriodPiece.[[note]]It even goes as far as giving Rhonda a smartphone, and [[RealityEnsues showing that the advent of smartphones have caused a fatal nosedive for Big Bob's Beepers]].[[/note]] That said, the characters are only slightly older than back when the show was explicitly set in the '90s.

* RealityEnsues: Big Bob's Beepers goes out of business due to the rise of cellphones and Big Bob's utter refusal to switch to selling cell phones, causing the Pataki family to move into the building it's sold at. This is TruthInTelevision for anyone who's owned a business, especially one focused on electronics.

** [[spoiler: A number of the scenes in the video made for the contest to go to San Lorenzo in ''The Jungle Movie'' are (remastered) scenes from the show's original run. In order, we have Arnold and Grandma cleaning Lockjaw in "Field Trip", Arnold and Gerald helping Mrs. Vitello in "Part-Time Friends", Arnold tutoring Torvald in "Tutoring Torvald", Arnold and the kids cleaning up "The Vacant Lot", Arnold getting Nadine and Rhonda to reconcile with each other in "Best Friends", Arnold going to comfort Mickey Kaline in "The Baseball", Arnold giving Eugene a bike in "Eugene's Birthday", Harold giving up Thurston the kitten in "Harold's Kitty", Arnold running off some muggers in "Mugged", Arnold dressed as a banana for the school play in "Downtown as Fruits", Arnold being crazy in "24 Hours to Live," and Arnold running with Grandpa Phil in "Steely Phil."]]

* RealityEnsues: Big Bob's Beepers goes out of business due to the rise of cellphones and Big Bob's utter refusal to switch to selling cell phones, causing the Pataki family to move into the building it's sold at. This is TruthInTelevision for anyone who's owned a business.

* EvilDetectingDog: Abner screeches like crazy when he sees Lasombra’s boat heading towards the boat that Arnold & his classmates are on.

* CharacterOutlivesActor: When Dino Spumoni appears in the video of people thanking Arnold for helping them, he is accompanied by his friend and lyricist Don Reynolds, who has no dialogue due to his voice actor Creator/HarveyKorman passing away nine years before this film was released.

* GettingCrapPastTheRadar: This film earns its TV-PG rating:
** The various examples of FamilyUnfriendlyDeath that occur, some of which happen on-screen. For example, [[spoiler: Lasombra uses one of his mooks as a [[HumanShield human shield]] against a barrage of arrows before dumping his riddled body on the ground, several other mooks are crushed to death by rocks, and Lasombra himself take a dart to his head, visibly showing the signs of being poisoned before he plunges to his death off the cliff.]]
** Eduardo, [[spoiler:the real one]], averts the NeverSayDie trope when [[spoiler: Lasombra falls off of the cliff.]]
** When Arnold [[spoiler:finally finds his parents, they look quite dead, only averted by Eduardo confirming that they have the sleeping sickness.]]
** Helga has footage on her laptop of Arnold undressing.
** Even though this characteristic is downplayed in the film, the very first shot of Miriam is of her drunkenly asleep on the couch.
** In Abner's flashback, the Craig Bartlett caricature, seen seated next to Abner on the plane, is clearly seen holding a martini glass, complete with an olive.

* ChuckCunninghamSyndrome: During the scenes at the boarding house: Ernie, Oskar, and Mr. Hyunh are shown, but Suzie is nowhere to be seen. Craig Bartlett [[WordOfGod revealed on a Reddit AMA]] that she divorced Oskar and moved out of the boarding house before the events of this movie.

* ChuckCunninghamSyndrome: During the scenes at the boarding house: Ernie, Oskar, and Mr. Hyunh are shown, but Suzie is nowhere to be seen. Maybe she finally had it with Oskar and divorced him.

* CharacterOutlivesActor: When Dino Spumoni appears in the video of people thanking Arnold for helping them, he is accompanied by his friend and lyricist Don Reynolds, who has no dialogue due to his voice actor Creator/HareyKorman passing away nine years before this film was released.

* ConspicuousCGI: The city, the ships, the airplane, the Corazón, and the [[spoiler: first shot of the lost city]] are in fairly obvious [=CGI=].