Research Hybrid Monster

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

Appearance
The Research Hybrid Monster was a relatively huge monster. It had claws, many sharp teeth with six eyes. It was also shown to be Quadrupedalism, meaning to walk on all fours. It also has black messy and spiked hair on its head that goes down its back.

History
This monster was assumed to be a cross breed between two monsters (as researchers referred to it as a "Hybrid Monster.") The monster escaped its containment, and 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 of 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.
 * The Research Hybrid Monster somewhat resembled Overgrown Rover's appearance.