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The Devon Corporation is very similar to Silph Co. from Kanto, but is the Hoenn equivalent. It is also rumored to run the Pokémarts in Hoenn.

Devon Corp. is chaired by Mr. Stone. It plays an important role in the games, allowing the player to receive certain important items and resurrect fossils. The Devon Corp. headquarters are the target for robbery by Team Aqua and Team Magma. After the player stops their crimes, Mr. Stone will ask the player to deliver a letter to his son Steven, and a Package to Captain Stern in Slateport City. He will reward the player with his or her Pokénav.

In the anime, Ash Ketchum and the gang visit Devon Corp.'s headquarters in the episode "Stairway to Devon". In this episode, Mr. Stone repairs Max's Pokénav because he accidentally spilled some liquid on it.