Disclaimer: Broly is not Canon to the main continuity of Dragon Ball.

The heavily controversial feat of Broly destroying a Galaxy.

He may not have destroyed the galaxy in one blast, but...

We know some things for certain:

1. He destroyed most of it.

It's likely they left a few bits and pieces as a trail for the others to follow:

Considering Paragus' whole plan was to lure Prince Vegeta to his death, and he had Broly purposely leave Ki signatures behind leading to New Planet Vegeta.

2. He did it in a relative amount of time.

It's illogical to think that King Kai waited decades to let Goku know what was happening.

3. Writers don't give a F*** about science.

We see the Galaxy spinning, it would be scientifically impossible for a galaxy to be spinning that fast in that amount of time, but then again it isn't really possible for anything to go Faster Than Light according to science. It's not that Science doesn't apply to fiction, it's that science doesn't usually limit fiction.

Now the feat:

It's highly unlikely that he actually destroyed the Galaxy in one shot, because he had been attacking places since he was a teenager.

But we do know he destroyed a good portion of it in a relative amount of time to King Kai.

So here's where the numbers come in.

1. So far, astronomers have found more than 500 solar systems and are discovering new ones every year. Given how many they have found in our own neighborhood of the Milky Way galaxy, scientists estimate that there may be tens of billions of solar systems in our galaxy, perhaps even as many as 100 billion.

Conclusion A:

Broly destroyed over 100,000,000,000 Solar Systems in a single blast. [Unlikely]

Conclusion B:

Broly destroyed over 100,000,000,000 Solar Systems over the time period of a year.

273972602 Solar Systems a day on an average

Conclusion C:

Broly destroyed over 100,000,000,000 Solar Systems over a decade.

10 Billion Solar systems a year on average

27397260 Solar systems a day on average.

Conclusion D:

Broly destroyed over 100,000,000,000 over 40 years (his lifespan) (bare minimum)

2500000000 Solar Systems a year on average.

6849315 Solar Systems a day on average.

Misc. Properties of the feat:

1. Broly must have MFTL+ Travel Speed and Reaction Speed.

2. It's likely he tanked a few of the stars he sent Supernova.

3. He can survive in space.

Misconceptions:

"Broly lost to an amped SSJ1, Broly is fodder."

Gohan, Trunks, Piccolo and Vegeta gave Goku all there energy, Goku transferred all that energy into Broly, causing him to overload. This is evident in the fact that Broly starts glowing and cracking the explodes.

"Broly lost to rusty SSJ2 Gohan and SSJ1 Goten and Goku."

First, in Movieverse Gohan wasn't "rusty".

He was considerably stronger.

Secondly, the simple answer is it was PIS. Nobody was able to harm Broly yet suddenly they vaporize him? Simple PIS.

Conclusion:

No matter how you slice it, you can't call this an outlier since Bojack and Hatchiyak also did similar things, and the film maker said Broly is 2nd to only Janemba in movie antagonists. The feat is massive no matter which way you interpret it.

Disclaimer: Janemba is not canon to the main continuity of Dragon Ball.

Here we will be discussing the underrated character from Dragon Ball Z: Fusion Reborn. He is a Multiversal Reality Warper.

Here is the DBVerse, the bottom half is the mortal universe, the top half is Other World (A separate Universe.) Other World actually appears slightly larger.

Baby Janemba warped The entire Other World, shown here:

"In "The Rebirth of Fusion!! Goku and Vegeta", he was sealed inside of Janenba's magical barrier, causing the laws of both this world and the afterlife to go haywire. (Daizenshuu 6, p.142)"

Magical Barrier[kekkai]

Category Ability User(s) Janenba Characteristics Janenba used this to wrap up Enma's palace. It has the ability to make Enma Daio and the others unable to utilize their power to govern the afterlife. What's more, it absorbs and disperses the power of Goku and Paikuhan's energy bullets. However, for some reason Paikuhan's insult attacks caused it to break. This magical barrier also vanished when Gogeta defeated Janenba. (Daizenshuu 6, p.142)

He warped the entire Other World Universe and made the powers of the Gods who resided there useless.

He also warped the mortal universe, he resurrected every dead person. Keep in mind he shows no sign of fatigue or stress from completely warping two universes.

This is two universes he has warped casually.

He was also able to create a mini Goku in his hand that was stronger than the original. He can also warp inanimate objects and turn them into other versions of him:

	Mini Goku[mini gokuu]
Category Ability User(s) Janenba Characteristics In order to counter Goku's Kamehameha, pre-transformation Janenba created a fake Goku on the palm of his hand, and had it fire a Kamehameha just like Goku. It appeared in the movie "Rebirth of Fusion!!~". After launching the Kamehameha, the Mini Goku disappears.

	Mini Janenba[mini janenba]
Category Ability User(s) Janenba Characteristics A technique which pre-transformation Janenba used. He creates countless small doppelgangers of himself from the human-shaped objects in Hell, and has them attack Goku. It appeared in the movie "Rebirth of Fusion!!~". (Daizenshuu 6, p.142)

He can open portals in time and space at will.

	Space Transference Punch & Kick[kuukan ten'i panchi ando kikku]
Category Special User(s) Janenba Characteristics Appeared in the movie "Rebirth of Fusion!!~". A technique where he rains down unpredictable attacks by unleashing punches and kicks into an outside dimension, which then come out of dimensional portals which open up in different places. (Daizenshuu 6, p.142)

He defeated someone who shook the universe as a side effect of powering up also.

He can create alternate dimensions in his hands and totally disassemble his atoms and move around.

	Springing Forth from Another Space[ikuukan wo hassei]
Category Special User(s) Janenba Characteristics A technique where his opponent's energy bullet is absorbed into the alternate space which he creates between his hands, deflecting it to somewhere else. The post-transformation Janenba used it in the movie "Rebirth of Fusion!!~". (Daizenshuu 6, p.142)

	Disassembly Teleportation[bunkai terepooto]
Category Ability User(s) Janenba Characteristics Janenba used this in the movie "The Rebirth of Fusion!!~". His entire body scatters to pieces like bricks of a jigsaw puzzle and disappears, and he then materializes as these pieces once again connect together. (Daizenshuu 6, p.142)

Janemba is the living definition of evil.

- DB Wiki.