A Link Between Worlds is a Nintendo 3DS adventure. You see a small Link in a green hat from above on the top screen; the lower screen can show your map and items. After the story gives Link this ability, he can become a flat drawing and travel sideways along a wall. That is how he gets around a corner or past a gap that blocks him while standing normally.
You do not have the ability at the start of a new save. If the game never shows an A Merge prompt beside a wall, keep playing the main story before trying this guide. The screenshots below show exactly what the prompt, drawing and energy bar look like once you can use it.








