The Cemu emulator is a marvel of modern software, allowing you to play Wii U masterpieces like The Legend of Zelda: Breath of the Wild in 4K resolution. However, by default, Cemu boots directly into your game files, skipping the iconic Wii U Menu (the "WaraWara Plaza").
Controller 1 to Wii U GamePad.File → Load → Navigate to 10004000/code/menu.rpx (or redpea.rpx depending on version).File → Add game title → browse to the folder.