
Quick answer — Kouichi Sakaguchi voices Arbok in Pokémon, Musashi in Gintama Season 2 Part 2, Hata Ouji in Gintama.: Silver Soul Arc and 10 more characters.
Kouichi Sakaguchi voices Arbok (Pokémon), Musashi (Gintama Season 2 Part 2), Hata Ouji (Gintama.: Silver Soul Arc), Hideyuki Maeda (Bunny Drop), Taichi Hotta (Glass Mask (2005)), Heichou (The Girl from the Other Side), Kawada (Ah! My Goddess: The Movie), Dieter Ness (Attack on Titan: Junior High) and 5 more.
Arbok is voiced in Japanese by Kouichi Sakaguchi.