Ooh and VirtualBoy!
And psp...

Jeez looking at these lists maybe i was a spoiled kid.
I didn't include the many variants of Gameboy.

Does a tomagachi(sp?) Count?
Along with the power glove, that never friggin worked, the power chair, d pad was leaning, the power mat (forget the real name) also had a cartridge modem for one of the early systems, again never worked.