Dark Beast

In the alternate dimension he came from, Hank McCoy was a mad scientist working for Mister Sinister in his breeding pens, intent on breeding more powerful mutants according to Apocalypse's "survival of the fittest" ideology.

However, while Sinister was methodical and rational in his experiments, McCoy (as ruthless as his mentor) sadistically delighted in causing pain to his lab subjects and in the cruelty of his experiments, which is why he was nicknamed the Beast both by prisoners and Sinister's Elite Mutant Force.

McCoy also experimented on himself in order to further his mutation, and gained his ape-like bestial appearance.

Any mutant that he deemed unworthy was turned into a component of a genetic stew that was used to create Apocalypse's army of Infinites.

Besides being one of the creators of the Infinites, the Dark Beast also experimented on Blink, on Jamie Madrox (thus being one of the creators of The Madri), merged all of the Power siblings into one hideous creature, made Nemesis into Holocaust following his defeat at the hands of Magneto, and was also responsible for the creation of Holocaust's lead hunter Wolverine (not to be confused with the X-Men's Wolverine who was known only as Weapon X in that reality).

With the end of the Age of Apocalypse, the Dark Beast was able to escape into Earth-616 through the M'Kraan Crystal.

He was believed to have died due to Quicksilver's interference in his set trajectory.

However, the only damage was that he landed twenty years in the past in the Morlock Tunnels.

Some time after his arrival he met a young Emma Frost, who helped him to regain some of his scattered memories.

The Dark Beast was responsible for the creation of the Morlocks.

The characteristics of the experimentation were later recognized by the 616 Mister Sinister as an unauthorized use of his own theories, leading him to order the elimination of the Morlocks.

The Dark Beast later kidnapped the real Beast and kept him a prisoner behind a brick wall.

He infiltrated the X-Men in his place by altering his appearance to match the real McCoy's fur color, although he occasionally found himself at risk of discovery due to Hank possessing a broader range of knowledge than himself, requiring him to bluff his way through some of the questions he was asked.

He helped keep up the ruse by slaying many of Hank's childhood friends and teachers, although he found himself unable to kill Hank's parents.

Angered at this emotional weakness, he decapitated a pedestrian as he left town.

The Dark Beast was able to keep up his ruse until the Onslaught Saga, during which the Dark Beast joined Onslaught.

Onslaught had, in fact, known from the beginning of Dark Beast's ruse and mentally shielded him from other telepaths at the mansion, intending to question him about the reality of his origin.

However, upon learning what happened in Dark Beast's reality when mutants ruled, Onslaught decided to destroy both races rather than helping mutants take their place as the world's rulers, only just being defeated thanks to the sacrifice of the Avengers and Fantastic Four.

He also had a few run-ins with Generation X and Gene Nation.

There he was the leader of the newly revamped Gene Nation, although through the robotic body of Wynter, attempting to capture Generation X in order to experiment on them.

The previous meeting between him and Emma Frost was also revealed.

He also led an incarnation of the Brotherhood of Mutants.

Right before House of M, the Dark Beast was in Genosha where he joined Xavier's team after being offered parole.

It was confirmed in The 198 Files one-shot that he stayed powered after M-Day.

Dark Beast returns and finally confronts his counterpart in the Endangered Species storyline where he ambushes him in Neverland, the extermination camp ran by Weapon X, to offer his services regarding finding a cure for M-Day.

The two form an uneasy alliance to tackle the impending mutant extinction but part ways due to their drastically different moral approaches to science.

During a trip to the Guthrie household aimed at requesting samples of DNA from the mother and father of several mutant, and non-mutant, children - the Dark Beast (without warning Henry) poisons one of the un-mutated Guthrie boys, Lewis, in a quick scientific experiment.

He then carries the dying boy's body back to the house, suggesting that they should try one of the girls next.

Shocked and enraged with his actions, Hank attacks the Dark Beast who, disgusted with Henry's inability to do all that is necessary to save their mutant species, beats him almost unconscious.

The fight is interrupted by Mrs. Guthrie, who fires a round from a double-barrelled shotgun into Dark Beast's left shoulder.

After scolding Mrs. Guthrie for thinking a round of birdshot would put him down, the Dark Beast is knocked unconscious by Henry.

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