Yuusha no Kuse ni Namaikida
This game is titled Holy Invasion of Privacy, Badman! What Did I Do to Deserve This? in North America and Yuusha no Kuse ni Namaikida in Japan.
Press L, R, L, R, L, R, L, R, L, R at the main menu. Repeat the code to return to the Normal difficulty setting.
Created by 321lettuce.
Strategy guides from GameFAQs