The Defense Mechanism of Alto Mare, also referred to as the DMA, is an ancient machine situated in the Museum of Alto Mare. This machine was constructed numerous centuries ago, with the goal of protecting Alto Mare from danger. The Defense Mechanism requires both the Soul Dew and either one of the Eon Pokémons to operate it. In Pokémon Heroes, Oakley takes control over the Defense Mechanism in order to subjugate the city. The Defense Mechanism was eventually destroyed when Latias used Safeguard to render the machine inoperable.