The title hints at the "Lost Artifacts." In this game, the traditional Regi trio (Regirock, Regice, Registeel) and their leader Regigigas receive massive upgrades. They have new "Origin" or "Awakened" forms that significantly boost their stats and change their designs, making them top-tier contenders for your team.
(Ordered roughly by usefulness / rarity) pokemon hyper emerald 55 lost artifacts top
If you search for the Pokemon Hyper Emerald 55 Lost Artifacts Top list, these five items are consistently ranked as the most game-breaking, powerful, and difficult to obtain. The title hints at the "Lost Artifacts