Here is a selection of 4 "Backpack Plushes". They're technically a pack you can wear on your back...but the compartment for holding items is very small. It's actually just a mini zipper with coin-purse size opening in the back of each character's head. Each pack has read straps & a carry handle. The dolls are about 21 inches tall each, and should be about 19.99. They are produced by Accessory Innovations Company.
The plushes look pretty decent, except for poor Knuckles there. His eyes are too tall (he looks startled) as well as being off-center (look how they don't align with his nose-seam) His feet are too small & he suffers from "big body". The fists are nice & large though, which is good. Shadow looks decent, with well sized feet & usual frown. Super Sonic is pretty good too. The Tails is nice as well, & his strap is orange.
You can buy these from "CuteSense" , which is NOT linked here because they sell bootlegs & licensed goods side-by-side. They don't seem to know or care if something is official or not, so *watch out* if you are shopping there!