Research Hybrid Monster

The Research Hybrid Monster was a Mysterious Being that went on a rampage years ago. It was killed by Blast.

Appearance
This is a huge, uncontrollable monster. Shown to have claws, many sharp teeth and six eyes. It was also shown to be Quadrupedalism, meaning to walk on all fours.

History
This monster was assumed to be cross bread between two monsters (as researchers referred to it as a "Hybrid Monster.") The monster escaped its containment, as it went berserk attacking anyone who got in its way. The monster eventually came over to a young, 10-year-old Tatsumaki's holding cell as she was left to be abandoned. The monster smashed down the door, in an attempt to eat her. However; Tatsumaki was suddenly saved by Blast, as he left a huge hole going through it.

Physical Abilities
Enhanced Strength: It appeared to be strong enough to break out containment and be able to smash down a locked cell door.

Trivia

 * In the original webcomic, this monster debut as a flashback in the Psychic Sisters Arc, but for the manga it's debut is now a flashback in the Monster Association Arc, while Tatsumaki and Drive Knight are fighting Orochi and Psykos.