The sprite gallery is used to display any Pokemon of the user's choosing. The Pokemon must be in the user's party to put it into the gallery. Doing so, however, will delete the Pokemon from the user's party. Using "spray paint" or
"spray paint DX" allows a person to put a Pokemon in their gallery without it being deleted.
The Sprite Gallery will arrange the Pokemon into different groups depending on their sprite type. One can not retrieve a Pokemon from the gallery, unless a "gallery voucher" is used, which restores a Pokemon to it's original state within the user's party, but it is then account bound and can not be traded.
The Sprite Gallery may be viewed from the user's profile.