Shed Shell

Allows switching out even when trapped. (Hold)

Shed Shell lets you switch out regardless of trapping moves or abilities like Shadow Tag. It's your escape button when normally you'd be stuck.

This is useful for Pokémon that are common trap targets. Steel-types against Magnezone, for example, can run Shed Shell to avoid being picked off. It's situational but can completely change the matchup when it matters, though.