Ultra-sun: It was born from sludge on the ocean floor. In a sterile environment, the germs within its body can’t multiply, and it dies.Moon: It was born from sludge transformed by exposure to X-rays from the moon. When its internal load of germs decreases, it dies.Alpha-sapphire: Grimer emerged from the sludge that settled on a polluted seabed. This Pokémon loves anything filthy. It constantly leaks a horribly germ-infested fluid from all over its body.