Palace Maven Spenser is a Frontier Brain in the Hoenn region. He lives the natural way and he knows how to make Pokémon medicine and food, of course with the help of his Venusaur.
He was accused of being the person that was behind of all troubles by Ruby and Sapphire because he also touched the Blue Orb but it was later learned that he wasn't. Also because of Emerald losing to Tucker he changed his plans and battled against Spenser.