Cactuar is an esper added to the Game Boy Advance and following versions of Final Fantasy VI. It is based on the Guardian Force of the same name from Final Fantasy VIII, being a seemingly regular cactuar that becomes a summon after a giant version of a cactuar is defeated as an optional boss.
The esper is identical to a regular cactuar fought as enemies. They are small cacti that move bipedal and have stiff arms and legs, and three holes in faces, representing two eyes and an oblong mouth. They have three needles on their heads.
It teaches the following spells:
The name "Cactuar" may be a portmanteau of "cactus" and "liar".