The Guardian Branch of the Custodian Guild specializes in search-and-retrieval missions. The primary job of Guardian Branch members is to find missing pokémon (and occasionally missing possessions) inside Mystery Dungeons and bring them safely home. It is lead by Branch Leader Weavile.
Guardian Branch members are encouraged to focus their efforts on speed of travel and minimal engagement with enemies. To a rescue team nothing is more important than finding their target as quickly as possible and safely escorting them back to town, and any time spend on unnecessary fights during a rescue job is time in which the target could fall further into danger. For this reason it’s often claimed that the most important supplies for a rescue team are medical equipment and Escape Orbs, and that floor-wide disabling Wonder Orbs come in close second.
Other rescuers have been known to claim that you just need to be strong enough to incapacitate enemies in a single strike.