Hi there!
I believe you are talking about this TileSet.
So, just for clarification:
In order to use the TileSet, you will need these 2 files.
About the Black Hole Building… Unfortunately they aren’t in the TileSet. Due to problems with the maximum number of colors in GBA.
In the future I will try to Re-work the entire tileset in order to get everything running, but for now I can only ask patience and say sorry for the inconvenience.
The ‘‘Creator’s Pocket’’ folder, is a folder where I let everything that may be useful for another map creator/editor.
I hope I could explain and solve your problem, wish the best!