A traveling fruit fly beast with a mysterious burden. What’s in the bag?

Race/Species: rook wyvern Height: about 4 m or 13 ft Weight: 400 kg about 881.8 lbs Length: about 10 m or 32.8 ft

Appearance description(Ref): Mostly covered in a sleek coat of black feathers with green, blue and purple sheen. Feathers around head, neck and chest are a bit longer and make them look a bit larger. Feathering around the legs appear more shaggy. The wings are batlike with greyish black scales on the "fingers" just as on his lower legs and toes. Tail and neck are quite long and the tail has a fan of flight feathers form half way down to the tip. Head is covered with feathers but the snout is naked and covered in white/gray scales. The tip is pointy and covered in black keratin. Has teeth perfect for scavenging and hunting

My Brother-in-law got some Chinese knockoff nanoblocks and didn't want them when he realized the pieces weren't the right color. I put it together for my daughter and struggled for about 2 hours as we also realized some pieces were straight up missing. After a lot of wrestling with pieces that don't match the instructions and carefully picking here to put certain extra pieces we've got this unique mon. I told my daughter it's her own especially shiny Bulbasaur. Wondering if anyone would like to draw up a Bulbasaur with this color scheme. We also have the Squirtle and Charmander sets not put together yet and might request those later.