A:Answerabout the size a game gear would be with extra attachments to make it bigger plus much bigger screen. Overall its not bulky or hard to conceal. Its a fairly small device with a big screen and a few different ways to play it for better comfortable gaming experience.
A:AnswerIf you purchase them from the Nintendo Online community, AND they are not specifically nuilt for the Wii U then yes. I.e, old Mario/Yoshi/Donkey Kong games from the original Nintendo or Super Nintendo, yes you can play those.
A:AnswerThat depends on the game and how many players it supports for local multiplayer. For instance, Mario Kart 8 will support up to 4 players on the same screen in docked mode.
A:AnswerNot positive on the Voltage, but when i went to europe i had to buy an adapter that converts the plug so that i could use a lower voltage device aka my cell phone. So i am assuming you will need to do the same to avoid damaging the system. But if i recall correctly the adapter is fairly cheap and should be local to you.
A:AnswerWith the right kind of adapter to lower the voltage to 120v, it could work. However, the console's power adapter is only intended for 120v and uses a usb type-c charging cable.