noun
Wii (Nintendo console)
Refers specifically to the Nintendo Wii video game console released in 2006.
Ｗｉｉで家族とボウリングをした。
I played bowling with my family on the Wii.
中古のＷｉｉを買った。
I bought a used Wii.
Later Nintendo console that succeeded the Wii U, released in 2017.
From English 'Wii', a brand name coined by Nintendo. The spelling with two 'i's was chosen to represent both the console's controllers and the idea of gathering people together.