Animenewsnetwork - The combatants square off. A hulking giant wearing a Hawaiian shirt, an absurd pompadour, and a metal grill declares his name-- Sonic Boom-- and how his total mastery of karate makes him an unbeatable ninja fighter. “Greetings,” responds his red-clad opponent, as he finishes his bowl of ramen. “How do you do? I am Ninja Slayer.” The fighters awkwardly bow to each other.