Hi, guys, I'm back. I like to introduce you to this crossover story based on my artwork on my DeviantArt. I haven't been on a writing stuff for a bloody while. I needed some time to think of a new story, but after I did the artwork, I've started to think of writing it for inspiration.

Now, just sit back, relax, fast in your seat belt, and enjoy the fanfic.

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

Somewhere in space, in another planet. It was filled with aliens, rocks, and different black ooze. But then, three young human boys travel through space to explore the planet. The leader was Jimmy Neutron, the boy genius. His two best friends were Carl Wheezer, the dim-witted one who always likes llamas, and Sheen Estévez, the not-so-bright one who is into Ultra Lord. And Jimmy's robotic dog was Goddard.

Carl was scared of the planet. "Um, Jimmy, remind me again. Why are we in this place for?"

"To collect some samples of this very exotically planet, Carl. There's nothing to be scared of." Jimmy said.

"Yeah, what about those ooze?" Sheen suggested when pointing at the puddle of black ooze.

"That'll do. Goddard, cylinder." Jimmy called out before Goddard gave him a cylinder to collect the ooze.

"So, what's the big deal, Jimmy? Why do we have to bring that stuff back with us?" Sheen asked.

"I just want to study it. Once I discover what these things could do, I'd be able to understand this planet's nature." Jimmy explained.

"I thought we're gonna check out some other dimensions." Sheen said. "I want to see some heroes."

"Once we get home and I experiment the ooze, we'll see some other dimensions, Sheen." Jimmy said.

"But, what if it's alive? It could attack us or something?" Carl asked fearfully.

"It's not alive, Carl. It's just ooze." Jimmy said.

"But I'm allergic to ooze." Carl complained.

"Is there anything else you're allergic to, Carl? Honestly." Sheen said annoyed. "First dusts, cats, dogs, I can't remember what else."

"I don't have a problem, Sheen!" Carl whined before he hit Sheen on the shoulder.

"Hey, don't hit!" Sheen hit Carl back, then the boys hit each other.

"Guys, guys, guys! Calm down." Jimmy said when separating them. "We have what we can take. Let's just go back home on Earth."

"Sorry, Jimmy." Carl and Sheen apologized.

The boys and the dog went back inside the ship and flies back to Earth.

Later, on planet Earth, in the Neutron house, Hugh Neutron was watching TV.

"I told you, it's not a rat trap." The man on TV said.

"It is now." The second man on TV said with a rat trap on his nose.

"Ow, that's gotta hurt." Hugh said. "I wonder if Jimbo's back from space already. I hope he's brought some souvenir."

Outside the house, Jimmy's ship landed on the ground, then the boys exits the ship.

"Ahh, back on Earth." Jimmy said. "Now, let's find out what this ooze can do."

The boys walked the shed before Jimmy pulled his hair for the computer VOX to scan it.

"DNA match: Confirmed. Welcome home, Jimmy."

Jimmy, his dog and his friends entered the shed to get to the lab.

Later in the lab, Jimmy was experimenting on the black ooze. He used a stun gun to electrify the ooze and it began to make just one move.

"Fascinating. This ooze is unusual." Jimmy said.

"So, what would you do with it now?" Carl asked.

"Can you make it a statue of yourself, Jimmy?" Sheen asked.

"Let's see how it works." Jimmy said.

He puts on gloves and starts squishing the ooze.

"Yuck." Goddard said disgusted.

Jimmy was morphing the ooze until he was finished. He has made the ooze a statue of himself.

"Well, what do you think?" Jimmy asked.

"Pretty." Carl answered.

"Cool." Sheen said.

But within a second, the statue melted down. Jimmy was disappointed, but he remained calm.

"Eh, I'll fix it later." he said. "Let's check out the dimensions, shall we?"

"Alright!" Sheen said excited.

Jimmy goes to the computer and starts analysing, looking on other dimensions. The known dimensions were Timmy Turner's world of 'The Fairy Odd Parents', the Dark Matter Dimension, another world with different aliens.

"These are old ones we've seen, Jimmy." Carl said.

"Are there any new ones we've never seen before in our lives?" Sheen asked.

"Well, there's…" Jimmy sees another dimension. "What's this?"

Jimmy scanned the dimension, the screen shows its inhabitants. The dimension was based on primarily Chinese culture, with some other East Asian, Southeast Asian, South Asian, New World, Siberian, and Arctic influences. Some people were all having unique powers of earth, fire, air and water.

Jimmy, Sheen and Carl were amazed.

"Wow, that's awesome. How are they having elemental powers?" Sheen asked in amused.

Jimmy checked for information.

"It's called bending. The ability to manipulate an element and is significant to many aspects of life in this world. There are five known bending arts; four of them bend a specific physical element while the fifth bends the energy within the human body itself. The only case of any one person being able to bend multiple elements is the Avatar, who has the ability to practice all five bending arts. Very remarkable."

"What's the Avatar?' Carl asked.

Not what, who." Jimmy said before he analysed the history of the Avatar. "The Avatar is the human embodiment of light and peace. As the only physical being with the ability to bend all four elements, it is considered the Avatar's duty to master the four bending arts and use that power to keep balance and peace among the four nations of this world, as well as between mankind and spirits. Upon death, the Avatar Spirit causes the Avatar to reincarnate into the next nation, dictated by the cyclic order: Fire, air, water, and earth."

"Reincarnate?" Sheen was confused. "How did that happen?"

Jimmy tapped his computer, and the screen showed the first Avatar fighting an evil entity.

"The Avatar Cycle was created when a human named Wan permanently fused with Raava, the Spirit of Peace and Harmony to fight Vaatu, the Spirit of Darkness and Chaos during Harmonic Convergence of 9,829 BG."

"I thought you don't believe in magic, Jimmy." Carl said.

"I don't, but spiritual nature, it seems quite natural." Jimmy said.

"What happened to that Vaatu guy?" Sheen asked.

"When defeating him, Avatar Wan locked him in the Tree of Time for ten thousand years. After Harmonic Convergence ended, the cycle started." Jimmy said while studying the origin.

"Ten thousand years?" Sheen was surprised.

"On the next Harmonic Convergence of 171 AG, he was released from his prison by a waterbender named Unalaq, uncle of the current Avatar Korra. They fused to become a Dark Avatar."

The screen shows Vaatu fusing with Unalaq and become a Dark Avatar. He fights Avatar Korra.

"Is that her? She's hot." Sheen said.

"She's beautiful, just like Jimmy's m…" Carl stopped himself to say, 'Jimmy's mom'. "Continue."

"Unalaq ripped Raava and destroyed her and Korra's connection to her past lives. He transformed into UnaVaatu." Jimmy said looking at the footage of Unalaq destroying Raava and becoming UnaVaatu. "My God. He must be a madman, hungry for power."

"Can Vaatu do that to Raava?" Carl asked.

"He cannot destroy light any more than Raava can destroy darkness. One cannot exist without the other. Even if Raava defeats Vaatu in this encounter, darkness will grow inside me until he emerges again. And if Vaatu defeats Raava, light will grow inside until she emerges, and she did. Korra managed to defeat him and refused with Raava, but the link to the past Avatars was lost forever, but that doesn't stop the new cycle."

Later, in ten minutes, the boys had seen every footage of Avatar Korra's adventures, including her fight with her enemies like Amon, Unalaq, Zaheer and Kuvira. Her romance with a firebender named Mako, later ended, then a new romance with a girl named Asami.

"That's lovely." Carl said.

"Two women in love. Now, that's what I call romance." Sheen said affectionally. "Hubba, hubba."

"This dimension is epic. We could go visit there and meet Avatar Korra." Jimmy said.

"Yeah, I wanna meet her and Asami. I dig these chicks!" Sheen said.

"Please let me see some llamas there. Please let me see some llamas there. Please let me see some llamas there." Carl begged.

"Right, I'll try to contact her first, and we'll be welcomed there, much as she'll be welcomed to our world." Jimmy said before he accidently spilled his Purple Flurp on the computer panel. "Oops."

The panel began to electrify. The electric beams were around the panel and the screen with the footage of UnaVaatu.

"Look out, it's gonna blow!" Sheen shouted.

The electric beams were now around the black ooze. The ooze started moving and rising. The boys and Goddard were stunned when it came to life. The oozed shaped into a humanoid creature with yellow eyes, resembling UnaVaatu. It roared to attack the boys who were screaming. Jimmy picked up his laser and shot the monster. It was dying by the beams from the laser. Jimmy picked up a tank and placed it into it.

"What the hell was that?!" Sheen asked in shock. "Is it dead?"

"I think so. It was dying." Jimmy panted before he puts the tank on the table.

"I think I better be going home, Jimmy." Carl said nervously.

"Yeah, I gotta watch Ultra Lord on 5.12." Sheen said before he and Carl left the lab.

Jimmy panted as he gazed upon the dead creature in the tank. He had never thought he created a monster like it.

"What did I do?" he wondered before his mother's voice was heard on the screen.

"Jimmy! Dinner time!" she said.

"Come on, Goddard." Jimmy said before Goddard grows at the tank. "It's ok, boy, it's dead."

Jimmy and Goddard leave the lab for dinner. Little did Jimmy knew; the creature was still alive, as its eye opened in the tank. It managed to break the glass free. It glides its way to the dimension portal machine, and tapped the panel to the dimension he could go to, the Avatar world.

The ooze monster cackled evilly before it grabbed a dimension traveling device and went through the portal to the Avatar dimension.

What has Jimmy created? Can he stop that monster? You'll find out on the next chapter.