Charm - Arguably the most evil of status attributes.. inflicting this status has some caveats.
Occasionally, the targeted enemy will still make a final attack before doing their special "charmed attack". Unfortunately, sometimes they are even more evil (see Tinymage).
When used against you, you completely "stop what you are doing"... unless you are the Avenger Sword wielder or have Beserk status (FF2/4 only)... and you will get a final last attack on the enemy before retargeting occurs.
Charm counteracts Berserk status...
Magic casting time is ignored while under Charm status (enemies never worry about this to begin with, only your own characters). Only valid spells being cast are White or Black (Summon/Call spells or Ninja spells are never cast).
Special character commands are never used under this instance either.
HP Leak - Frequently, if the attack that inflicts HP Leak doesn't visually hit its target, the status is still inflicted.
Under no circumstance where Stop, Paralysis, and Sleep can be inflicted at the same time. All three provide the same effect, except that Stop cannot be counteracted and there's no protection against it.
Status afflicting weapons tend to not work as well when another status is afflicted on an enemy. Weapons that inflict death status tend to not work that well when a status such as Sleep has been previously inflicted.