How they compare: Doomsday

Doomsday was created to be the perfect unkillable entity and was accidentally bred with an innate hatred of all things Kryptonian. He has proven the general scourge of the Universe to the point that even the beings of the Sphere of the Gods render him unkillable.

 

Doomsday's most notable power is his nigh-unkillability. Even Universal Entities like The Gods believe him impossible to kill and he has been compared to a Pseudo-Abstract Entity. This in part due to his incredibly insane durability even for his tier, enough that he was able to briefly survive the end of time. However it is bolstered by his regeneration and adaptation abilities, able to regenerate from at least vaporization, and resistant to almost any mundane form of destruction, even things like the Omega Beams can't destroy Doomsday. He can also adapt in seconds to new weapons or abilities used against him. He was able to adapt to the Radiant an Energy Being specifically made to beat him and grab and physically tear him apart.

In terms of Strength, Doomsday is easily on par with with the powerhouses of the Post-Crisis Era, able to equal and oftentimes surpass Superman. Considering that their are a number of low galactic to galactic feats for the Post-Crisis Powerhouses, this would put Doomsday's strength somewhere in the galactic range. He can also physically tear holes in spacetime like he did the Phantom Zone, which is also the Underworld suggesting he can hit the Astral Plane.

Doomsday is also surprisingly fast, to the point that he was faster then an Early Flash who could surpass the time barrier already, and late Superman has to push himself to match Doomsday's raw speed. He was also able to fight Earth-1 and Earth-2 Superman at the same time. Earth-2 Superman is the Golden Age Superman, the physical equal of the Silver Age Superman who could casually break the time barrier as a child, which would again suggest Doomsday is past the Time Barrier. That said, he can't fly.

Doomsday has a number of other abilities, the most notable of which is his virus/contagion abilities. Doomsday's real nature is that of a horrible virus which can infect and corrode material down to the molecular level as well as possess entities with black spores and turn them into Doomsday. As part of his virus nature Doomsday can drain the life essence of other entities. 

How would Doomsday do in other verses?

In Marvel Doomsday's powers are for the most part on par with Herald Class Entities however Doomsday's durability and adaptability means in a one-on-one fight means that he would defeat most entities in his weight class. Doomsday would fight it harder to kill entities above that level but his haxes and difficulty to kill would make it possible. It is very likely that he would be immune to the destructive powers of even Skyfather or Cube Level Entities and would require a Celestial Level Entity to fully kill.

In the Bastard!! universe, Doomsday's power would put him above the Seraphs in terms of raw power, and his raw durability would be nigh-unmatched and he would also possess a likely speed advantage over the verse. However while it is possible he can attack the astral plane, it is unlikely he can attack the spiritual plane required to kill most Powerful Entities of the Verse, unless he proves capable of adapting it. While Existence Erasure attacks are common in Bastard!! it is difficult to say that would definitely work on Doomsday given that he resisted the Omega Effect which also erases things from existence. It is possible that a battle between Doomsday vs Dark Schneider or Uriel might end in an eternal stalemate, or possibly one side victory, though this is more speculative.

In the Dragon Ball Universe, Doomsday would be well above most of the fighters Pre-Super in all physical regards. In Super there are a number of entities that would be potentially comparable to Doomsday in speed and greatly superior in firepower but they would have major difficulties in killing Doomsday with the most likely possibilities being Zeno-Sama destroying the entire timeline Doomsday resides in or possibly Beerus's Hakai (though again existence erasure may not work against Doomsday). That said while they would be equal in speed, have far better range, and can't be damaged by his normal attacks, he could still possibly start doing serious damage if they get in close via using his haxes like his possession.

In the Asura's Wrath Verse, Doomsday would be a major threat to the verse, having similar power to the strongest entities with superior speed and durability. That said if unprepared it's possible the verse could stop him if Chakravartin uses his more hax abilities to trap Doomsday in the Underworld

In the Darkstalkers Universe, Doomsday would have similarly strong defensive capacities as some of the verse's strongest characters, as well as enhanced speed and raw strength equaling the firepower of some of the cast's strongest characters. He would very likely be able to overwhelm even the likes of Morrigan and Lilith. That said he would not be able to do so with Jedah Dohma, who's regeneration would make it nigh-impossible for Doomsday to kill him unless he adapts very strongly to him as well as Pyron who's sheer size means that while Doomsday can do damage to him, it would take at least dozens of years to do significant damage to him. Whether the verse can put down Doomsday would require one of those two to have a hax that can stop his regeneration cycle.

In the God of War Games, Doomsday would be as strong physically as the lower 3 of the 6 greatest Gods which include Ares (Or later God of War Kratos), Athena, and Helios, all of whom are stronger then Nyx which is the night sky. Nyx is also a primordial, a race of beings who created the galaxies with the force of their strikes which similarly cements them on that level. That said Doomsday in terms of firepower would be well below the three brothers Zeus, Poseidon and Hades as well as the strongest titans like Cronos and Atlas who are universal level. Despite this Doomsday would cause major problems and devastation and might be able to destroy even them given enough time and adaptation if not put down. It is very possible however one of the Gods could send him to another dimension (though if he can be trapped there is important since he broke out of the underworld). It's also possible Hades (or another God but Hades would make most sense), could drown Doomsday in the river styx which drains life force away. This would take a very long time since Doomsday would be able to absorb the life energy of the souls in the Styx already, but it would theoretically kill him eventually.