There's an area now under Gerudo Desert that now holds the small wallet, instead of the obvious location in Level 4. Now it's extremely harder to find. And just so no one bugs me about it when it's release,
Spoiler: show
Bomb the walls in the room east of the room with the staircase to ground level. You'll hear a secret sound after one. Walk under that to get it.
The area where it used to be now hints to it's location. I now also have plans to implement Russell's old bonus level. It's found through bombing a wall. I'm not going to say anything more, but trust me, it worked perfect in the BS tileset.