Fanart for Rick Griffin's Housepets!
Let's retell the story with laboratory hypothesis for fun!

The Babylon Garden was in a petri dish. Bahamut was the principal investigator. Kitsune, Cerb, Pete and Dragon were research assistants.
Heaven was a refrigerator, where everything was frozen in time. Eudoant lived in a trash bin, where everything was forgotten.

In order to win the bet of cultivating powerful colonies, Pete created King using transgenic technology without Bahamut's permission. Then Pete lost the bet, but transgenic factors (coins) remained in the dish.

The channel to the forgotten world was accidently opened by Keene, introducing harmful bacteria (Negabreel) into the dish. Steward, affected by transgenic factors, grew into super-bacteria after contacting the unknown. Therefore, the dish was extensively contaminated in a short time.

Kitsune realized the problem, and urgently saved a small part of the sample into the refrigerator. Kitsune was nervous, because this situation had never been observed.