Rainbow Pachirisu

Rainbow Pachirisu was a Pachirisu created by Shiny Corp alongside Chimo in an attempt to make artificial shinies. After being purchased for an assumingly very high price, she quickly died.

Trivia

 * Recently, there has been hint at another short story release, this time being about a Pachirisu named Momo who was friends with Chimo before he met Jordan. It's almost certain that Momo is the rainbow Pachirisu, but the story hasn't been released yet.