The Relic Hunters are a group of explorers that attempt to advance the future by excavating secrets of the past by diving into old, dangerous ruins. They have an annual expo, hosted by Mimic in Scuttle Town. The last expo happened in Scuttle Town in Risky's Revenge.
Mimic and Sky's father are the only currently known Relic Hunters. It is mentioned by townsfolk that there are few of them still around (citation needed).