This enemy is similar to The Face but it is Alien-type and he has a 30% chance to freeze your cats. At 100% strength magnification, he has 44,444 health and deals 1,333 damage, about half of The Face's stats (99,999/2,000). However, the first time a player meets I.M. Phace he will have over 300,000 health and deal over 9,000 damage with his area attacks.
I.M. Phace is quite a bit faster than The Face but cannot compete with the lightning speed of Shy Boy, though he does have a rapid attack rate. His attack animation is stranger than the other The Face variants, as it is slightly less rapid than that of Shy Boy and Leggsy, because he only attacks when the smaller head closes its mouth, giving you some breathing room to time units.
Do not bring Necromancer Cat, due to the fact that I.M. Phace outranges it. Psychocat is also outranged by one pixel (equating to one range). Macho Leg Cat is strong against Aliens, so bring it for its good stats but it is also outranged by I.M. Phace.
I.M. Phace is a very big threat when first encountered, as the player will need the Aqua Crystal Treasure to successfully deal with it. Even with the Aqua Crystal, it has 266,664 HP and deals 7,998 damage. It can also outrange Salon Cat and other cats with similar range. Lizard Cat can barely outrange it. Bahamut Cat can deal a bunch of damage to it, so be sure to bring him too. Later on, when you have Cataur, he might help against I.M. Phace, not only outranging it, but also dealing massive damage against it.