This mod was built for Bloons Monkey City, but might work for BTD5 and BTD Battles.

How to install:
 1. Download and Unzip TD Loader.
 2. Download and Unzip the Solid Bloons Mod.
 3. Open TD Loader and go to 'Mods'
 4. Click 'add mods'.
 5. Find and Open the Solid Bloons Mod.
 6. Enable the Mod.
 7. Click 'play'.