The target-cancel bug is a bug found in the Famicom, WonderSwan Color, and Origins versions of Final Fantasy II. The bug allows for a player to level up weapons and magic without any real effort by either selecting the Attack or Magic commands, then immediately cancelling that character's actions and repeating it ad infinitum. The bug cannot be exploited on a character in the last slot, as performing any action with that character will result in all characters executing their selected actions. It is therefore better to use this bug when a guest is in the party so it can be exploited for Guy.