Not sure if these are already in the game, but:

• An Egg that's just sitting there out in the open, that when damaged, hatches into an arachne.

• Summoners/Callers (can't remember the exact name, they're in Final Fantasy II) in end-game zones that summon..... level 1 imps.

• Chupon (I think, He's from Final Fantasy III), with a sneeze attack that "ejects" you 100 yards backwards.