We're back on chapter ten.

REMINDER: I DO NOT OWN JIMMY NEUTRON, AVATAR OR ANY OF THE CHARACTERS.

Somewhere in the Spirit World, Jimmy and Goddard were searching for the Shadowbender and Beautiful Gorgeous, or Past Korra.

"Oh, for the love of Thomas Henderson, where is she?" Jimmy wondered before Goddard barked. "I know we've been in the Spirit World all day and night, but we have to find Korra's past self and warn her about Shadowbender."

Then, a beep from Jimmy's earpiece was heard. Jimmy knew it was Korra calling.

"Jimmy, I've made some changes, Asami and Mako used one of your time machines and came here. Raiko followed us and tried to mess with my time. I exposed him and had to get his past self arrested and now, Raiko's gonna kill… me."

"Then take him down before he does. He's no match for you." Jimmy said.

"No, not 'me'-me, the other me. he's gonna kill her and erase me from existence." Korra's voice said.

"Good science! If your other self opens the other spirit portal, he might be here already to kill her and if he does, you won't defeat the Dark Avatar, ten thousand of darkness years will begin forever, and we'll have a major paradox!"

"Wait, wait, wait. A paradox?" Korra's voice asked shockingly. "You mean one of those things that can destroy the universe?"

"Precisely. I'll keep a lookout on Raiko." Jimmy said before he sees Wan Shi Tong's Library and they landed on the ground. "There's the library. Jinora must know where she is."

Before he goes to the library, he sees Beautiful Gorgeous flying on a jet-back.

"Time to die, Neutron." She said before Jimmy blasted her with his electricity laser. She fell down on a rock unconscious.

"That was easy." Jimmy said.

The duo walked to the library.

In the library, Jimmy and Goddard were searching for Past Jinora for her help to find Past Korra. They saw Professor Zei's corpse. They finally found Past Jinora and Furry-Foot, who looks for a map and informations of Harmonic Convergence.

"Ugh, it's not in here either! I have to find the portals. Korra is probably waiting for me there right now! I need to find a map that shows where the spirit portals are, could you help me? Thanks, this is it! The Tree of Time! That's where Avatar Wan imprisoned Vaatu!

Past Jinora reads the book. "Whoa. 'The elders believe that as long as the portals are closed during the Harmonic Convergence, Vaatu will remain imprisoned and the battle between good and evil will not be fought again. But, if both portals are open, spirit energy is amplified greatly. During the Harmonic Convergence, this energy will be great enough to allow Vaatu to break free from his bonds, and the material world will again risk being consumed by darkness.' My God."

"And he will fuse with Unalaq to create a Dark Avatar." Jimmy said before Past Jinora got startled. "It's ok, I'm here to help. My name's Jimmy Neutron. I know everything about Unalaq's plan."

"Good, cause we have to warn Korra!"

Past Unalaq appeared and with Past Wan Shi Tong. "Leaving so soon? When Wan Shi Tong told me he had a visitor, I had to see it with my own eyes. I can't believe Tenzin sent his daughter here instead of coming himself… what kind of a father is he?"

"Better than you." Past Jinora snapped.

"And look, it's the little boy with the big head. What are you doing here?"

"To warn Korra!" Jimmy answered bravely.

"Warn her, of what? Me bringing peace to humans and spirits?"

"Wan Shi Tong, how can you be helping him?" Past Jinora asked.

"Unalaq has proven to be a true friend to the spirits, unlike the Avatar." Past Wan Shi Tong answered.

"Why would you wanna help Vaatu escape? He'll destroy everything!" Past Jinora tries to explain.

"And he's gonna fuse with him." Jimmy said.

"Don't believe everything you read. Why don't you come with me, so you can do some firsthand research?" Past Unalaq asked evilly before Past Furry-Foot turned dark and grabbed Jimmy and Past Jinora.

"Furry-Foot...?"

"Unalaq, listen, there's an ooze monster here and I have to stop him." Jimmy tried to explain.

"I never saw any ooze monster in my life, Neutron. You two are coming with me." Unalaq said before Goddard tried to attack, but Past Unalaq knocked him out with his block of ice.

Jimmy got shocked. "Goddard!"

Past Furry-Foot takes Jimmy and Past Jinora. Beautiful Gorgeous who regained consciousness saw the spirit adducting them.

Later, on their way to the Tree of Time, Past Unalaq and Furry-Foot were walking while keeping Jimmy and Past Jinora captured.

"Tell, me, boy. What did you know about my becoming a Dark Avatar?" Past Unalaq demanded.

"First tell us why you would free Vaatu and fuse with him. Why are you doing this? It's evil." Past Jinora said.

"You think what Avatar Wan did was good? Driving almost all the spirits from this world? The Avatar hasn't brought balance, only chaos. Korra calls herself the bridge between the two worlds, but there shouldn't be a bridge: We should live together as one. It's true that when Wan fused with Raava, he tipped the scales in her favour, but this time I'll be here to level the playing field. When Harmonic Convergence comes, I will fuse with Vaatu, and together we will become the new Avatar: A Dark Avatar."

"And that's why you betray Zaheer and the other members of the Red Lotus when they were caught trying to kidnap Korra as a child." Jimmy said angrily.

Past Unalaq turned to Jimmy in surprise as he knew about the attempted kidnapping these years ago.

"How did you know about that?" he asked.

"I've read all about you back in my dimension."

"You're from another world?" Past Unalaq asked disbelief.

"Yes, I am. I know everything about this world. Unalaq, think about what you're doing. I know that you've always had a deep connection with the spirits, but you're still a man. You're still Tonraq's brother, you're Eska and Desna's father, you're Korra's uncle. Are you willing to throw your humanity away to become a monster?" Jimmy begged.

"Don't lecture me, boy. I'll be no more of a monster than Korra. The only difference is that while she can barely recognize her own spiritual power, I will be in complete alignment with mine. Vaatu and I will be as one. No one will be able to stand against us."

The group continued walking to the Tree of Time.

Later, Past Korra, on the dragon bird arrived at the Spirit World intersection.

"That's where Vaatu is." Past Korra said.

"So you've returned, Raava. The Harmonic Convergence is coming soon, and this time, I'm going to wipe you out for good." Past Vaatu said evilly.

"I think you've said that before, Vaatu. But I'm here to close the portal. You're not getting out." PastKorra determined.

"Oh, you might want to reconsider. That is if you want to save your friend."

Past Unalaq appears, levitating Jimmy and Past Jinora in front of him, and encircling them with purple water. Jimmy and Past Jinora's bodies slowly changes its colour to purple.

"Jinora!" But Past Korra doesn't know Jimmy. "Who's this?"

Past Unalaq got confused. "What do you mean you don't know James Isaac Neutron? Didn't he helped you fought Eska and Desna?"

"I never seen him before. And I didn't fight your kids." Past Korra said.

Past Unalaq looked at Jimmy in confusion, but he remained serious.

"Open the portal." he said.

"I can't believe I trusted you, Unalaq! You made me think you wanted to restore balance with spirits, but this… this isn't balance, it's madness! Now let them go!" Past Korra demanded.

"If you want your friends to make it out of the Spirit World, you'll open the other portal now." Past Unalaq said.

"I told you, I don't know… What's his name again?"

"James Isaac Neutron!" Past Unalaq answered bitterly.

"Call me Jimmy, I'll explain everything to you." Jimmy said.

"Don't do it, Korra!" Past Jinora begged.

"What will it be? Open the portal, or lose your friends' soul forever?"

"Stop! I'll do it." Past Korra said before she walks to the Northern portal.

She puts her hand on the beam, and it has been opened.

"Now, let Jinora go." Korra demanded before she screamed as Unalaq waterbends at her.

"You should've come through the portal. Then you could do this!" Past Unalaq said before Goddard bit his arm, freeing Jimmy and Past Jinora.

Past Jinora ran to Past Korra. "Let's go."

The dragon bird spirit carries Past Korra and Jinora and flew away.

"I'll see you two soon, Raava, Korra. Once the Harmonic Convergence comes, I'll be free from this prison, and then I will have my revenge!"

Jimmy's body turned back into normal, and Past Unalaq grabbed him.

"How come Korra doesn't recognize you? What kind of trick are you playing?" Past Unalaq demanded.

But, Goddard grabbed Jimmy before a blast was shot. It was Beautiful Gorgeous.

"Friends of yours?" Past Unalaq asked bluntly.

"Nope."

Gorgeous tried to shoot Jimmy, but Jimmy picked up his Hypno-Beam and used it to hypnotize her like the last time on Mount Everest. Jimmy hopped on Goddard and flew away before Past Unalaq could attack him.

He turned to Beautiful and snapped her back to herself by shaking her.

"You! What is going on? Neutron was helping the Avatar, right? Why doesn't she know him? Answer me!"

"She doesn't… yet." Gorgeous said before she blasted away back to Shadowbender's hideout.

Past Unalaq stared to her. He begins to wonder about Jimmy.

"What is going on here?"

Next chapter will come.