The Wii U was Supposed to Support two Gamepads, but Nintendo diverted
Amazon.com: Wii U Pro Controller- Kulannder Wireless Rechargeable Bluetooth Dual Analog Controller Gamepad for Nintendo Wii U with USB Charging Cable (Black+White) 2Pack, for Kids : Video Games
Reggie Explains Why the Wii U's Dual Gamepad Promise Died + Still Believes in NFTs! - YouTube
Nintendo: two Wii U Gamepads will work on one system (update 2: but at a cost - and now with video) | Engadget
Reggie Explains Why The Nintendo Wii U Didn't Utilise Dual GamePad Support | Nintendo Life
Wii U supports two GamePads, Nintendo confirms - Polygon
Support Bluetooth Wireless Controller For Nintendo Wii U Console For Wii U Pro Classic Dual Analog Remote Game Gamepad Joystick - Gamepads - AliExpress
Here Are The 23 Nintendo Wii U Launch Titles | TechCrunch
Why The Wii U Never Supported Dual GamePads - GameSpot
Nintendo Wii U Black Console Bundle WUP-101(2) 32GB w/ Gamepad, Cables & HDMI | eBay
NEXiLUX Wireless Classic Pro Controller Gamepad for Nintendo Wii U, Gray - Walmart.com
2 In1 Wireless Remote Gamepad Controller Built-in Motion Plus For Wii /wii U For Nin Tend Wii U Remote Controle Joystick Joypad - Gamepads - AliExpress