0
VITA
Nintendo, the first handheld console was the Game & Watch, not the Gameboy.
The Nintendo Switch functions as a hybrid, so it can function as both a home console as well as a handheld.
It has a detachable tablet, where you can take it on the go, but can also be connected to a TV like a normal console
The upcoming Nintendo handheld console is the 3DS.
Nintendo 3DS