Attachment was originally devised as part of an April Fool 's joke . But the Game Boy-based firm has now announced it is making the case a reality . Called Smart Boy , it attaches to a phone and works with existing cartridges . Price and release details have not yet been announced .
Attachment was originally devised as part of an April Fool 's joke . But the LA-based firm has now announced it is making the case a reality . Called Smart Boy , it attaches to a phone and works with existing cartridges . Price and release details have not yet been announced .