The Alien variant of Mooth. It has more health, damage, range, and a brand new ability: he has a 30% chance to freeze your cats. However, he is a bit slower than his non-Alien counterpart. Be wary of this enemy; he can decrease your timed score in the Into the Future stages. If you don't have strong ranged cats, he can be a big problem.
When you first encounter it, it has about 125000 HP and 5500 damage, making it a tough enemy to deal with. It's fairly hard if you don't have Bahamut Cat but it is still manageable. Just spam meatshields, Dragon Cats and other strong ranged attackers.