Your big Wigglytuff was infected with a disease that had no cure at the time, so she had to be taken to your storage area for where your unused Pokémon are kept in. You put her in a room that projected a grassy environment. A couple weeks later, you just got a cure for her illness. As you opened her enclosure, you were shocked by what you saw. Luna was now dark green with pure white eyes and disgusting yellow teeth. She saw you with a look of happiness Master-Chaaaaaaaaaaaaaaaaan!!!!