Warning: That story plays in the Hidorika Saga.
From the Dimensions opened and sent everytime something to the "real" world. It was the Evil SSJ4 Vegeta with blue coat. What is he doing here?

Dragonball Jr Movie 6

Shadow Super Saiyans

It was very peacefull on the earth and nobody knew about the new danger who was back. AGAIN
The people drove cars or went to McSatan (McDonald was change for the old Hero who defeat for many years a monster named Cell).
Waiter: Hello, how can I help you?
A mother with his daughter wanted to buy something from McSatan.
Daughter: 1 Double Cheese Satan Burger with extra chips.
Waiter: What would you drink?
Daughter: Satan Cola, plz.
Waiter: Ok and the mother?
Mother: Hmmm I would like a Satan Chicken Burger and a Satan Cola Light.
Waiter: Ok...it will be finished in 5 minutes.
Daughter: Huray!

In the desert trained Vegeta Jr very hard.
He opened his eyes and destroyed all stones with a shout.
Vegeta Jr: AAAAAAAAAAAAAAAAAA!
The rocks became sand now and Vegeta Jr looked very beat.
Vegeta Jr: Heh..heh..heh...Huh?
He looked behind him and saw the Evil SSJ4 Vegeta.
Vegeta Jr: What?! How can it be?
ESSJ4V: I am back thx to a broken Dimension hole.
Vegeta Jr: What are you doing here?
ESSJ4V: I am here to remember you who you are. You must fight agains Goku Jr and beat him.
Vegeta Jr: I fight if I am ready?
ESSJ4V: Whats wrong? Cant you transform to a SSJ4?
Vegeta Jr: I am already a SSJ4.
ESSJ4V: Than he is to strong for you.
Vegeta Jr: You think to know everything. I cant fight if you are here. I dont know what do you want.
ESSJ4V: I need you for fight again my old opponent. I must defeat, Goku. He named himself Kakarot.
Vegeta Jr: That mean you are from another dimension.
ESSJ4V: Some stupid humans brough me in that time and Goku from that time defeated me. But thx to a broken Dimension hole I am back in the world of live.
Vegeta Jr: Grrr...
ESSJ4V: I telling the true. Plz you must help me. Fight agains Goku Jr. We have the same blood. We are a family who help each other.
Vegeta Jr: You are my grandpa but from another Dimension. That mean your not realy my grandpa.
ESSJ4V: I am from another dimension your grandpa like you tell that means I am realy your grandpa.
Vegeta Jr: Thats very stupid.
ESSJ4V: You are more than ready to fight agains your rival. Dont forget. You are the grandson of the prince of all saiyans.
Vegeta Jr: You are right. HAAAAAAAAAAAAAAAAA!
Vegeta Jr transformed in that moment to a SSJ and flew to find Goku Jr.
ESSJ4V: Finaly...hehehehhe...

In same time meditated Piccolo Jr.
He opened his eyes and saw Vegeta Jr flying as SSJ.
Piccolo Jr: Whats wrong with him? Whatever it is I have no time for that.
He closed his eyes and meditated again.

Vegeta Jr flew with highspeed to find Goku Jr.
After some min. he find him finaly.
Goku Jr was shopping with Disha.
Disha showed Goku Jr a dresh.
Disha: What do you think about that one?
Goku Jr: Can we go home now?
Disha: Goku, forget it. We are here to look something for our double.
Goku Jr: O man. Huh?
Vegeta Jr came down as a SSJ with SSJ aura.
Goku Jr: Hi Vegeta. Whats up?
Vegeta Jr showed his hand.
Goku Jr: Huh?
Vegeta Jr fired an energy beam with his hand and Goku Jr dodged.
But the attack killed the people behind him.
Goku Jr: Vegeta, are you crazy?
Disha looked very angry.
Disha: Thats enough. I will show him. Huh?
Goku Jr didnt let Disha go to Vegeta Jr.
Goku Jr: Wait. I will talk with Vegeta.
Disha: But Goku.
Goku Jr: I finish it as fast as possible. And than we go shopping. Tomorror. The whole day.
Disha: Huray.
Vegeta Jr looked very serious to them.
Goku Jr: I never see you like that, Vegeta. I know why you are here. Lets go to a place without humans.
Vegeta Jr smiled as he heard that.
Goku Jr transformed to a SSJ and flew with Vegeta Jr to a desert.
Disha: Good Luck. You can defeat him.

During the flying, Goku Jr asked Vegeta Jr something.
Goku Jr: Whats going on with you? Why you attacked me on the city?
Vegeta Jr: All you questions will be answered soon.
They came finaly to the desert and transformed back to normal.
Goku Jr: Before we start you must tell me. Whats wrong with you?
?: He is like everytime. I am the one who makes problems.
Goku Jr looked to the mysterious guy.
It was ESSJ4V.
Goku Jr: What?! You again?
ESSJ4V: I am back but not for revenge. I am here to help my grandson to fight you.
Goku Jr: What?!
Vegeta Jr: I trained as many years for that day, Goku. Lets fight, HAAAAAAAAAAAAAAAAAAA!
Vegeta Jr showed his power and began to transform.

Cooler Jr, Freezer Jr and Cell Jr feel the power.
Cooler Jr: Whats going on?
Cell Jr: Thats Vegeta's aura.
Freezer Jr: He is transforming.

Vegeta Jr: HAAAAAAAAAAAAAAA!
After a lightshow became Vegeta Jr a SSJ4.
Vegeta Jr: HAhahahahaha...
ESSJ4V: Thats the SSJ4 from that time. Very interesting.
Goku Jr: Did you forget? My grandpa showed you in that form. Lets see a real SSJ4. HAAAAAAAAAAAAAAA!
Goku Jr made the same like Vegeta Jr and became a SSJ4.
Vegeta Jr: Heheheh...finaly.
ESSJ4V: Hehehe...lets see which Super Saiyan 4 is stronger.
Vegeta Jr: HAAAAAAAAAAAAAAA!
Goku Jr: HAAAAAAAAAAAA!
The fired in same time an energy beam and made a big explosion.
Vegeta Jr: Grrrrrr...
Goku Jr: Grrrr...
ESSJ4V: Yes...yes...
The two SSJ4 began to punch each other.
It looked like one is stronger than the other one.
Vegeta Jr kicked Goku Jr back.
Vegeta Jr: Whats wrong with you? I though your stronger Goku.
Goku Jr: I think that was enough warm up. HAAAAAAAAAAA!
Vegeta Jr: You are right, HAAAAAAAAAAAAA!
They showed there power each other.
The energy was amazing.
ESSJ4V looked very happy about the battle.
Piccolo Jr came in that moment and saw the fight.
Piccolo Jr: Why is Vegeta fighting Goku? And what the hell is the ESSJ4V here?
Goku Jr punched Vegeta Jr and kicked him down.
Vegeta Jr started a new attack.
Vegeta Jr: Take this, FINAL FLASH!
Goku Jr dodged the attack but Vegeta Jr came from the ambush and punched him down.
Goku Jr crushed on the ground and began to bleed in his face.
Goku Jr: Grr...I cant give up now.
Vegeta Jr: Whats wrong? It that all?
Goku Jr looked very angry.
He teleported to Vegeta Jr and kicked in his face.
Vegeta Jr began to bleed now, too.
ESSJ4V: It looks very good but I need more time.
Piccolo came down to ESSJ4V.
ESSJ4V: What are you doing here?
Piccolo Jr: Thats my question to you. I heard what you said.
ESSJ4V: What a pity. Now I must kill you.
Piccolo Jr: What?!
ESSJ4V fired an energy beam hit Piccolo Jr very bad.
Piccolo Jr: AAAAAAAAAAAAAAA!
Goku Jr and Vegeta Jr heard that and stopped to fight.
Piccolo Jr crushed by the attack on the rocks and exploded.
Goku Jr/Vegeta Jr: PICCOLO!
ESSJ4V looked smiled to Goku Jr.
ESSJ4V: Now its my turn. HAAAAAAAAAAAAAAAAA!
He shout Goku Jr with his energy.
Goku Jr: AAAAAAA! Whats going on with me?

Behind Goku Jr opened a Dimension Hole and from it came another Goku SSJ4.

Vegeta Jr: Whats going on?
The hole was closed and the new Goku looked like the real but with blue coat.
Goku Jr looked very beat.
Goku Jr: Damn it. Evil G-grandpa.
ESSJ4V: Finaly you are here, Goku.
ESSJ4 Goku: I am Kakarot. Evil Super Saiyan 4 Kakarot (ESSJ4K).
Vegeta Jr: That was your plan, right? You wait if I am finished with Goku to bring ESSJ4G back.
ESSJ4K: MY NAME IS ESSJ4K, HAAAAAAAAAAAAA!
ESSJ4K fired a Kamehameha to Vegeta Jr but another Kamehameha stopped it.
The ESSJ4s looked to the guy who do that.
It was Goku Jr who looked very beat.
Vegeta Jr: Goku!
ESSJ4V: Hehehe..you are finished now. You cant help your friend anymore.
ESSJ4K looked to ESSJ4V.
ESSJ4V: Are you ready to fight, Goku?
ESSJ4K: I am KAKAROT!
The two ESSJ4 flew to Vegeta Jr to finish him but in that moment flew a destruction disk.
The SSJ4s could dodge and looked to the one who used the attack.
It was Freezer Jr and he came with Cell Jr and Cooler Jr.
ESSJ4V: Damn it.
Vegeta Jr: It was about time guys.
Freezer Jr: We came as fast as possible.
Cell Jr: We knew something is wrong as we feel Vegeta's and Goku's aura beat.
ESSJ4s: Grrrr...
Cell Jr: Guys, what can we do now? That guys are SSJ4.
Cooler Jr: I though about the same problem.
ESSJ4V: Hehehe...it wasnt a good idea to help your friend. Am I right?
?: Special Beam Cannon!
ESSJ4V: AAAAAAAA!
The SBC hit ESSJ4V his eyes.
ESSJ4V: I cant see anymore. Who the hell did that?
Piccolo Jr saved his friends, felt down and became aswoon.
Cooler Jr: Piccolo saved us.
ESSJ4V: I cant see anymore.
ESSJ4K looked to ESSJ4V and focused his power.
ESSJ4V could open one of his eyes now.
ESSJ4V: What are you doing?
ESSJ4K: I dont need you anymore. DIE!
ESSJ4V: AAAAAAAAAAAAAAAAAAA!
The Kamehameha killed ESSJ4V with one shout.
ESSJ4V: YOU WILL PAY FOR THAT! AAAAAAAAAAAAAAAAAA!
The attack destroyed the whole body of the SSJ4.
Vegeta Jr: You monster. He helped you and you killed him with one shout.
Goku Jr: And you call yourself friend?
ESSJ4K: I never call somebody friend.
Goku Jr: Vegeta, you must finish him along.
Vegeta Jr: But!
Goku Jr: Did you remember what I tell you?
Vegeta Jr: I will finish him. I will kill you for everything you do.
ESSJ4K: I killed one of my own dimension. He wanted to kill you. What did I to you?
Freezer Jr: Yes, he is right.
Vegeta Jr: Than I will kill your because you are evil.
ESSJ4K: Thats sound like a better reason.
Vegeta Jr: FINAL FLASH!
ESSJ4K: KAMEHAMEHAAAAAAAAAAAAAAAAA!
The 2 attacks hit each other and it looks like Vegeta Jr will lose.
Cooler Jr: Damn it. The fight with Goku Jr made Vegeta Jr very beat. We must help him.
Vegeta Jr: NO, I WILL FINISh HIM ALONG! If I cant do it, I am not allowed to be a real Saiyan.
ESSJ4K: Thats the spirit boy. HAAAAAAAA!
He needed only a little shout to defeat Vegeta Jr now.
ESSJ4K: But spirit is never enough to defeat me. MUHAHAHAHAHA!
Vegeta Jr: I am ... the ...prince...of all...SAIYANS! HAAAAAAAAAAAAAAAAAAAAA!
Vegeta Jr shout with full power the attack back to ESSJ4K.
ESSJ4K: WHAT?! HAAAAAAAAAAAAAAAAAAAAAAAAA!
The attack crushed on ESSJ4K and destroyed him.
ESSJ4K: AAAAAAAAAAAAAAAA!
Everybody transformed in that moment back to normal.
Cooler Jr and Cell Jr brough Piccolo Jr and Goku Jr to Vegeta Jr.
Freezer Jr: Vegeta, you was great.
Goku Jr: Yes...I ...ne-never ...I had no idea...how strong you are...
Piccolo Jr: That was ...awesome.
Vegeta Jr: Thx guys...I am very hungry.
Goku Jr: Me, too.
Cell Jr: Lets go to McSatan.

Our friend finished the evil SSJ4 called Shadow SSJ. And the peace is finaly back. But everywhere is another one who wanna make trouble.

The End

ESSJ4V stands for Evil Super Saiyan 4 Vegeta

ESSJ4K stands Evil Super Saiyan 4 Kakarot

Original I know. There is a backstory I have written about the Evil Super Saiyan 4 which would be more interesting in this "movie". Sadly this is just a fluff filler side story if anything.