I've tried searching through the manuel multiple times, But nothing really states how to do this.
Way back when it first came out, I distinctly recall playing Legend of Zelda: The Wind Waker HD using the Gamepad for a display and a Pro Controller to move. After I had a beaten the game I took a break from it, As the months went by I've played a few other games.
New Super Mario Bros U for example, However I noticed with this that in spite of the Wii U being capable of displaying the game on the Game Pad, There were no actual options to utilize the Game Pad's screen with a Pro Controller. I had assumed this was just an oversight with the game, And left it at that.
Coming back to now though, Due to a recent error my Wind Waker HD progress was lost. As a result I decided to playthrough the game again. Unfortunately, I've come to find out that my earlier options have be nullified/updated. Unless I'm missing something, It's impossible to use the Game Pad for a display while using a Pro Controller, You have to pick one or the other.
Is there anyway to override this by keeping the Pro Controller as the actual controller, And just have the Game Pad as a display? It's a rather big flaw with TV mode if you're forced to use the chunky Game Pad as the controller. (Specifically for Wind Waker HD, However if there's a method for other games like New Super Mario Bros U I'd hear those aswell)