@EmperorIng217 The player on the GBA sees a simplified top-down map of the area. They can move around the room independently or follow Link. Enemies are marked by little bat/skull icons, and signs and other objects of interest with exclamation points.

The Tingle player can spend Link's rupees to activate a number of abilities, such as creating an explosion at the cursor location (Tingle Bomb), refilling Link's health and magic ("Ting" potions), or giving Link brief Hover Boots-like levitation. Maps also have a few hidden locations where Tingle can find rupees, and every dungeon has a secret Tingle statue hidden somewhere. ...Tingle can also randomly get "stuck" sometimes, requiring Link to move to his location in order to free him (and giving rupees to Link as a reward for doing so).

The Tingle Tuner can't be used inside boss rooms, in areas without maps such as houses, or during dialogue or cutscenes.

@Hell Inspector @TeridaxXD001 So what exactly did this do? I only ever played the Wii U version so I don't know. Obviously the tingle bottle replaced this and it was a GBA connectivity thing but what did it do? Did it show a map on the GBA screen?

it ain't foolin no one its a GBA

I actually kinda had fun with this thing.