Muddles by throwing Stones, and turns opponents into Imps with its Tail attack.
The Knotty is an enemy in Final Fantasy VI.
Like most enemies in the Yeti's Cave, it can inflict Imp on characters with its special attack, Tail. Knotties tend to attack in packs and have no elemental weaknesses, but their HP is very low for this point in the game and any level two spell like Fira should be enough to dispatch them.
1st Turn: Attack (66%) or Tail (33%)
2nd Turn: Attack (66%) or Stone (33%)
"Knotty" is a corruption of naughty, meaning "disobedient" or "mischievous".