Hoenn Frontier Brains
Tucker is the Dome Ace of the Battle Dome. He is a Frontier Brain in Hoenn.
Tucker runs late for a press conference about the opening of the Battle Frontier and rides his Salamence in an attempt to get there on time. Emerald spots him and mistakes him for a guide; their confrontation ends up with Tucker knocked out and tied up and Emerald arriving to accidentally crash the press conference, earning Tucker's—and every other Frontier Brain's—enmity. Tucker in particular holds a grudge.
After Emerald defeats Noland, Tucker and Brandon accost Emerald, demanding to know which facility he is challenging next and insisting it be their own. They chase him through the forest, irritating him enough that he grabs them by their heads and smacks them together. He also hangs them, and himself, up and falls asleep for the night, deaf to their cries.
Tucker is the first and only Frontier Brain Emerald loses to, which Tucker takes great joy in.
Tucker can really hold a grudge: even after he gained respect for Emerald, he took special delight in Emerald despair after Emerald lost to him.
Charizard defeats Emerald single-handedly.
Metagross is mentioned by Ruby but never seen.
Tucker tries to ride Salamence to a press conference but is ambushed by Emerald.