The Wii U has sold through 13.5 million units, making it officially Nintendo's worst-selling console | VG247
Nintendo Switch: technology has finally caught up with the company - The Verge
Is the Nintendo Switch significantly better than the Wii U? - Quora
Amazon.com: Brook Super Converter - Wii U to SW, Wii Retro Controller Adapter for Switch/ PS4/ PC Game Consoles, Supports Wii Taiko Drum/Classic/Fighting Stick : Video Games
Wii U Architecture | A Practical Analysis
Nintendo Confirms Three New Wii U Hardware Bundles for Europe | Nintendo Life
Nintendo Switch replaces Wii U on Nintendo homesite
Why You should Get a Nintendo Switch Instead of a Wii U
Nintendo Switch vs. Wii U vs. New Nintendo 3DS XL | How do the specs stack up? | Digital Trends