Micro
Released: 2005
Tiny, premium, gorgeous screen
Does NOT play original GB/GBC games
Advance SP
Released: 2003
Clamshell design
Front-lit, later backlit, Rechargeable battery
Advance
Released: 2001
32-bit power, landscape design
Still no backlight
Light
Released: 1998
Pocket version with a backlight
Holy grail for collectors
Color
Released: 1998
Color at last
Backward compatible with original Game Boy games
Pocket
Released: 1996
Slimmer, lighter, clearer screen.
Still monochrome, way more civilized.
Game Boy
Released: 1989
The brick. Grey. Immortal.
Monochrome screen, legendary battery life.