Students and parents at one Hyattsville elementary school are unusually familiar with the voice of their PTA president—not because he talks a lot at the school but because he’s a prominent voiceover artist who acted in the Pokémon TV series. Now Jamie McGonnigal wants to take on a new role: school-board member. He’s hoping to fill the Prince George’s County Board of Education seat for District 3, running in the nonpartisan November election agai…