STRUGGLE is a CPU Mode in SSBM which can only be found under Debug Mode. It causes a character to behave just like a normal CPU opponent, with only one difference, which is that normal CPU opponents always aim to attack human players unless there are only CPUs present in the match or if another CPU stands in their way, while CPUs that are assigned the mode "STRUGGLE" will always aim to attack whichever character is closest, regardless of whether that character is a CPU or a human.