Plutonian microbe

Plutonian microbes were ravenous omnivores that devoured anything in their path, the most feared bacteria in all the cosmos. (K9TV: Black Hunger)

Biology
Almost nothing is known about them besides their eating habits. They were closely related to viruses. They had a hibernation mechanism that activated when their food supply was drastically depleted. (K9TV: Black Hunger)

History
By 2050, bodies of debris dislodged from Pluto and harboring these such microbes arrived on Earth. They were salvaged by The Department. The specimens were stolen by Drake, who spliced them with yeast to create a monster, The Hunger. K-9 burned his fuel cells to generate an electromagnetic field that reversed The Hunger's polarity and sucked them into his body. Although he had yet to dispose of them properly, they were rendered defenseless. (K9TV: Black Hunger) They were most likely destroyed alongside the crystalline Plutonians when a tidal wave of ionizing radiation consumed the planet in 2157. (NA: GodEngine)