In Wario Blast there is a secret password (5656 or 6565) which enables "The Battle" mode. In this mode the player should kill as many enemies as possible during an unlimited time. I kill a grand total of 0 enemies and I get to the results screen as soon as possible.
Category: uses a password, pacifist (no enemies are killed).
I guess this is a real category (using passwords to unlock alternative game modes in order to speedrun those modes is OK), if a different category from the any%.
I also guess this is not an interesting category :)