I have the following:

Original Game Boy
Game Boy Color
Game Boy Advance
Game Boy Advance SP
Game Boy Advance Player
Game Boy Advance Micro
Nintendo DS
Nintendo DS Lite
Nintendo DSi
Nintendo DSiXL
Nintendo 3DS
Nintendo 3DSXL

A couple of the older ones are lying around somewhere in my parent's house or possibly with my sister's home, but I do own them all.