"The Fenton Menace" is the twenty-seventh episode of the television series Danny Phantom.
Danny's friends and family think that he is going crazy when he claims to see a ghost that no one else can see. Jazz decides on a vacation for the whole Fenton family, but Danny aims to show her that the ghost he sees really exists and is not just in his mind.
This episode is narrated by Jazz and mostly told from her point of view.
Jazz narrates the story as the scene plays, with the Fenton family driving through the canyons. She expresses how she feels she is the most mature member of her family, keeping an adult mind and making sure her parents do not discover Danny's secret, but now she fears that it may be necessary to tell them.
Jazz recounts to how it began: a family expedition underwater via submarine to search for ghosts. Danny spots the sunken pirate ship of Youngblood from "Pirate Radio." Misinterpreting Danny's words, Jack heads inside the ghost ship. Immediately, Danny spots a ghost, but none of his family members see it.
Panicking, Danny quickly heads to the controls of the ship and sends out a variety of weaponry to attack. They escape, but in the process, they accidentally destroy the pirate ship and lift the ghost shield that had been trapping the ghosts. They reach surface where Danny's family questions his motives, his parents going as far as strapping him on a table and spinning him on a machine to take the "crazy out of him".
Seeing that did not work, Jazz takes it upon herself to figure out his problem. She listens in on him having a conversation with his friends in school where even he thinks he's having hallucinations. Jazz decides then that Danny going ghost while in such a state would be hazardous for him.
Tucker arrives with a way to fix Danny's problem of being stuck with his family when he needs to go ghost he pulls out a iPod containing sounds of Tucker snoring, sneezing, and going to the bathroom for use behind closed door to simulate a person's presence.
As the bell rings, Sam goes to class and drags Tucker with her. Danny then sees the so-called ghost again and goes to transform, only to run into Jazz who tries to stop him from doing so. He runs to the boy's room however, transforms, and attacks, worrying Jazz further. With straing noises coming from the boy toilets as Mr. Lancer come along he tells Jazz "If that's her brother in there, then he needs to get more fiber in his diet."
Jazz suggests a ghost-free family vacation camping trip, something the parents don't seem to agree to until Danny, having found the ghost again apparently, blasts the entire basement lab with a Fenton Bazooka.
The next day, Tucker and Sam say good-bye and express their concern to Danny while Jazz takes the weapons from the RV offline. After Danny sees the ghost yet again, the family heads off.
Maddie hands Jazz her childhood 'Bearbert Einstein' teddy bear while in the middle of driving, to which Jazz orders her not to treat her like a child. She then gets into an argument with Danny until he spots a cowboy on a horse... going at 70 miles per hour and keeping up with the RV.
Danny then goes into the bathroom to go ghost and uses the iPod Tucker gave him to make it seem he's in the bathroom. He then leaves to fight Youngblood. Jazz once again keeps her folks distracted from Danny while muttering about her disappointment in him fighting ghosts.
In the meantime, Danny discovers the reason only he can see Youngblood is that the ghost child is only visible in the eyes of other children. During all past encounters, Danny was the only child there besides Jazz, who thinks of herself as an adult (with one notable exception, see the goofs section).
Youngblood sends Danny back to the Fenton RV to continue his pattern of craziness, just in time to leave the bathroom so Jack can use it. Youngblood reveals that he plans to convince everyone Danny is crazy so he'll be locked up in an insane asylum.
The family sets up camp for the night where Jazz keeps a close eye on Danny, despite Youngblood flying around teasing him in silence. Danny hides in his sleeping bag and uses Tucker's iPod to pretend to sleep, only to go ghost and find Youngblood.
Jazz quickly figures it out and heads outside where Danny turns human and tries to convince his sister to get the weapons online in the RV. Instead, Jazz kicks him into the Fenton vehicle and traps him inside, putting on the ghost shield to humor him in case ghosts attack.
While Jazz eyes Danny, Youngblood starts pushing the tent containing the sleeping Fenton parents towards a raging river. After much unsuccessful convincing, Danny finally decides to force Jazz to embrace her childhood by insulting, teasing, and finally ripping her favorite teddy bear up.
Jazz instantly starts to throw a fit over Bearbert Einstein, jumping up and down and crying, hears Youngblood say "Man, she's even brattier than I am!", looks behind her, and finally sees Youngblood.
After letting Danny out, he runs off to "get help" while Jazz handles Youngblood by returning the weapons on the RV, if not to get revenge for her teddy bear.
The tent, meanwhile, has been pushed into raging waters by Youngblood's horse. Luckily, Danny, now transformed into Phantom, saves them in time before they plummet into a waterfall. Danny and Jazz then work together to stop Youngblood and his horse, eventually trapping both in the thermos.
Afterwards, Jack and Maddie wake up and attempt to destroy Danny with a Fenton ghost weapon Jack revealed to have somehow, but Jazz distracts them long enough for him to fly away to safety.
Jazz concludes the story, stating that she is still a responsible young adult, but Danny is a responsible kid, which means she can still allow herself to be a kid now and then while it lasts. With that, she hugs Bearbert, but a fart noise comes out. Inside Bearbert is Tucker's iPod.
- Danny Phantom: Season 2, Part 1
- Danny Phantom: The Complete Series
- Jazz pretends to not know Danny is a ghost, as she found out he is one in "My Brother's Keeper" but has not told him that she knows yet.
- Allusions: See List of allusions
- Goofs: See List of goofs
- This is the second episode to have a character narrate the episode. The first was "What You Want".
- This episode aired out of order. It was released after "The Ultimate Enemy," which is where Danny finds out that Jazz knows his secret, but takes place before in the canon timeline, as Danny still attempts to hide his powers from Jazz and she still respects his secret as his to reveal.
- This is the first title card to show Dannys emblem in the series.