Apicot Berry (item)

Increases the holder's Special Defense by one stage when they reach or go below 1/4 max HP. One-time use.

Competitive use Not much. The passive healing offered by will do more for you than a defensive buff when you're on death's door. Could be used in a chain, but it's better to just put Leftovers on something with a move that increases defenses instead of sacrificing healing.