To place a Monster on Gold Island, it must first reach Level 15. The following Monsters are eligible:
- Natural Monsters located on the Natural Islands or Mirror Natural Islands
- Shugabush, if it is on Plant Island or Mirror Plant Island
- Wubbox, if it is on the Natural Islands, Mirror Islands or Ethereal Island
- Core Seasonal Monsters located on the Natural Islands or Mirror Islands
- Jam Boree, if it is on Seasonal Shanty
Rare and Epic variants of eligible Monsters can also be placed on Gold Island.
Natural Monsters that are not located on one of the five Natural Islands or their Mirror counterpart are not eligible to be placed on Gold Island.