Pokemon Crown (Beta 1 v9) is an incomplete ROM hack for the Game Boy Advance, likely based on either FireRed or Emerald. The beta designation and version number suggest it is still under development. The ROM hack is fan-made and separate from the official Pokemon franchise.  Gameplay would feature the familiar elements of the original Pokemon games, but modified substantially to create a unique experience. The beta version likely contains some bugs and incomplete elements, although nine versions point to active development.

Pokemon Crown (Beta 1 v9)

Pokemon Charged Red v2.0.3