Equestria gets attacked by Broly. Celestia and Luna sends the royal guards to stop Broly to find out that they failed. They then sends the mane six to use the elements of harmony only to see the elements fail. The Princess then tells Twilight to find out who could stop Broly before he levels Equestria.
 
In a last ditch effort Twilight uses a teleport spell to teleport Goku and Vegeta from their universe over to theirs so they can stop Broly. Goku and Vegets transforms into their Super Saiyan 4 forms and blows Broly into bits with a ki blast and kills him.
 
Celestia: “…An transformation?”
 
Goku: “Yeah. What you’re looking at now is my fourth and ulitmate transformation. Super Saiyan 4.”
 
Celestia: “Super Saiyan 4?” (…A-amazing! Such a high level of engery… He’s way waaay stronger than that ‘Broly’ guy he just defeated. Getting him angry might not be a wise thing to do…)
 
Celestia: “…So by ultimate you mean this is your final form right?”
 
Goku: “Yeah. …Well, I can still transform into Ultra Full-Power Saiyan 4 and then there’s the fusion dance too so Vegeta and I could fuse into Super Saiyan 4 Gogtea and double our Super Saiyan 4 power levels as well.”
 
Celestia: “Wow! That’s Amazing!” (Crap… I better stay on his good side then. Getting on his bad side will just get all of us killed. …This other guy looks a lot more moody than Goku… He said his name was Vegeta. …He might be trouble…)
 
Pinkie: “Whee! We won! This call for a-”
 
Celestia: “!” (Shit!) Teleports Pinkie out of the castle.
 
Vegeta: “…..” Pays it no mind and goes about his business.
 
Celestia: “…..” (Phew! That was a close one… Dammit Pinkie!)

We all know Fluttershy is gonna go apeshit and kill him , either that or Celestia will unleash her previous student that she keeps locked up in Tartarus

Wait to die. Your FUCKED Equestria!!!!!

uuuhh… Pray?

Get Luna to send him to the sun?

Umm, fire the Orbital Friendship Cannon?

beat him with their anti gary-stu powers

Kamehameha him to the sun with the elements

Use elements. Gain champion.

What to do? Easy: tell him that Dragonball is old hat, and that until he can demonstrate that he’s a retarded pirate, a caffeinated ninja, a kid with all-powerful toys or easy-carry monsters, a robot pilot OR a magical girl you will have nothing to do with him.

What to do…
 
Add ‘broly’ to hidden tag list
 
Problem solved.

@abearkiller
 
That’s Canterlot, not Kakarot!

Well
 

Dumb Rock:
 
Broly: You lie throws blast Canterlot

I have a few ideas.

Tell him that Kakarot is not here.

Teach him that friendship is magic.

Imawhale:
 
Exactly. Let this be Twolight Sperkle’s problem.

Pwnypony: kind of obvious I wrote “What do ponies do?” on purpose

grammar fail, grammar fail everywhere

Actaully. Considering he’s attacking Equestia and not Equestria the ponies don’t have to do jack.

The Hulk shows up and kicks his ass, there I win.

Uh,find the elements of the harmony?

Zap him with the Elements of Harmony and see what happens.