Acidic Dumple

Acidic Dumples are a subspecies of Water Dumple with tough hide that is able to withstand acidic environments. They usually inhabit acidic pools.

In Pikmin: Back in Action
Acidic Dumples appear in Pikmin: Back in Action. They act like all of the other Dumples, but they live near acidic elements.

In Pikmin: Return to the Distant Planet
Acidic Dumples also appear in Pikmin: Return to the Distant Planet, and they mostly appear in or around acid pools or acid gas, making them dangerous. Acidic Dumples secrete acid, evaporating any non-Green Pikmin that come in contact with it. If being attacked by Green Pikmin, the Dumple will shake them off, and then attempt to swarm the Green Pikmin and eat them. A simple strategy is to quickly throw Green Pikmin onto the Dumple until it retreats, as it will attempt to call nearby Acidic Dumples to swarm your army. Once defeated, they no longer secrete the acid and are safe to carry by other Pikmin.