Custom cover art, made to UK Nintendo DS case specs. DS box manual hinges are great at holding Game Gear games! The amount of work done to these varies - Tails Adventure is largely just the original boxart with stuff laid over it. Sonic Chaos is a partial recreation of the JP boxart, but still mostly uses the original scans as a base. Sonic 1 was the most involved, as I basically recreated the layout of the original GG case from scratch - I even painstakingly made a Sonic-less version of the GHZ background art from the Master System cover, not realising the actual manual has a clean version already... oh well!