So, to get the moshling Roxy, you have to enter a code which is HOBBIDIDANCE. Once you do that, you'll get an ULTRA RARE seed called Radiant Roxy Rose. Plant it in your garden along with 2 other random seeds. Wait about 12 hours and you can catch Roxy the Precious Prism. Here's here bio:
(Roxy; The Precious Prism)
Ultra Rare
#101
Secret Set
Deep beneath the Twinkly-Dink mines lays a rich seam of Rox. But
Precious Prisms don't hang out there. It's too obvious! These super
Ultra Rare Moshlings are so priceless they're scared to lay a finger on
anything (including themselves!) in case they leave smudges, hence the
silly white gloves. Crazier still, they often shatter into squillions of
pieces. Handle with care!
Habitat:
I once spotted a Precious Prism during the Great Rox Rush of Eleventy Seven, but I can't remember where.
Likes:
Vinegar baths and buffing machines.
Dislikes:
Magpies and fingerprints.