Prior to The Island
Some Rumble Keepers placed the ninja in the Keepers' cage. When they tried to escape, they zapped them with their spears. They were later seen guarding the ninja, until Zippy made them run away. They later were chasing or being chased by Zippy, and some were able to electrocute the ninja, placing them on poles. They later were with Mammatus when he sent Jay to "Wojira".
Some of the Rumble Keepers tried to stop the ninja from saving Jay, but failed. Later on, they, with Mammatus, realized that Wojira was a fraud.
Some Rumble Keepers held spears to Jay's head when he exited the Hydro Bounty, but were stopped by PoulErik as he greeted the ninja. Some Rumble Keepers were later at the Keepers' Village when Mammatus talked with the ninja, and gasped when they realized the Amulet was fake.
Rumble Keepers are the lowest-ranking Keepers of the Amulet, but their work on the island is a essential. As both guards and gardeners, they preserve the natural balance of their isolated home - sometimes tending to the flowers and other times fending off Clutch Powers!
They keep the island clean, trim the bushes and water the flowers. As the island gardeners they care for the plant world. They are always outside, so wear big hats to protect them from the sun.
- 173. "The Storm Amulet"
- LEGO Brawls (non-canon)
- They are known for giving their flowers names.
- It is currently unknown who voices them, as they were screaming and shouting in "The Gift of Jay."
- PoulErik was originally a Rumble Keeper.
- According to Keeper tradition, the Rumble Keepers can participate in a ritual challenge and become Thunder Keepers if they prove themselves worthy in the challenge.