Golden Bloon

The Golden Bloon is another bloon in the metal bloon family (like leads), so they're also immune to sharp projectiles. It travels at the speed of a red bloon. It has 50 HP, stating that it has a very high atomic bond. Upon popping, it releases 4 Silver Bloons. This is its only ability:

Shiny and Hard: Transfers 5 Yellow Bloons on screen into Golden Bloons.