Mutonium

Mutonium is a Meardan/Ungrit super-soldier serum created during the second Ungrit-Pokey-Eye War. It causes enhanced physical abilities, but also aggression and warps the user's personality.

Chase McFly (TPUWCPADOSU) succumbed to it, and traces of it still linger within Fifi La Fume (TPUWCPADOSU).

History
At first used by Tirgnu for rapid regrowth of cells during the terrifying times of the SUPEW and having been acquired by his Sudlivarg-residing friend Peter Griffin, the Ungrit desired having his own superpowered army. Very sleek and hard to spot rocket ships were used in the process, and most of them were stationed on Earth.

Cape Kragils, Chase McFly, and Yvonne Rosen ended up defeating Tirgnu and all his allies, which led them to the mysterious Earth cavern where the mutonium, several decomposing Ungrits, and a Turkey leg with an intricate pattern used to locate rocket ships were located. Tirgnu tried to torture Cape with the turkey leg, but he grew to like it. Cape and Meerdrru Sligark managed to analyze the patterns of the turkey leg once they escaped Tirgnu's clutches. As they reached the spaceship, Chase McFly collapsed, incredibly weakened and sick. Cape had no choice but to inject the serum into Chase, but this attracted the Ungrits to it, and they kidnapped Meerdrru and Cape, in addition to Yvonne. Angered that he was left for dead and with much-improved physical strength, Chase searched for his former friends and murdered the Ungrits.

Tirgnu continued to inject multiple Ungrits and Meardans with the mutonium that hadn't been burned by Cape Kragils, but they all died. As Cape and Meerdrru searched for a mutonium cure, they were taken by Chase, now desperate to stop their mission. There was a massive fight between the former allies and Chase stabbed the turkey leg through Chase's eye, though this didn't actually kill him. Chase loaned the Mutonium to an unidentified individual only known as "Blood Monger", who could control it fine. Most people in Blood Monger's army, including Cyndi Byron's brother Mickey Byron, were unable to face the Mutonium and died almost instantly. Cape Kragils successfully killed one of the survivors of Blood Monger's attempts, in spite of his super-strength and super-durability. Blood Monger tried to kill Fifi too, but this time Cape was able to save his friend with the mutonium.

Cape reunited with Meerdrru and they burned a decoy box implanted by Chase, while Kragils Consolidated Applied Sciences was forced to mass-produce Mutonium and used Fifi's blood to infect criminals and inmates with the substance. Team Turkey, Natalie Lee, and Shadow the Ant worked hard to create a new cure, but Blood Monger stole it, before realizing what Chase's plans were. Fluttershy forced Cape to cure a dying Fifi as soon as possible.

Trivia

 * At one point, a robot was created by Tirgnu Labs that had mutonium inside it.