DS Remover Pack
From Creatures Wikia
"This pack contains 3 agents that can help your game run a bit quicker.
The DS extras remover will remove some agents and most of the eco system from it, but don't worry about food, the tubas will still grow from time to time. The other 2 agents are for your DS docked or undocked worlds with the desert and aqua room, these agents will remove all the eco system from both rooms."
Created by MNB.
Can be found at Emmental's Docking Station Agents.