Only one enemy in this pack faces four directions so far and that is the Mini Skeleton - Front, Side, Back, Hurt(Front)
The other enemies face forward or to the side and are meant to be floating / flying enemies and look good in game without the need of back or side sprites.
Aether Moth - Idle, FX, Hurt
Big Jellyfish - Idle, Hurt
Deep Moth - Idle, FX, Hurt
Eyebat - Idle, Hurt
Fishman - Enter, Exit, Hurt, Throw (Attack), Pufferfish (Projectile)
Float - Idle, Hurt
Ghost - Idle, Hurt
Honoo Bird - Idle, Hurt
Jellyfish - Idle, Hurt
Lich - Idle, Hurt, Jar Animation
Mini Mage - Idle, Hurt
Puppet Mage - Idle, Hurt, Attack
My free slime pack has enemies of both types. The slimes face four directions and the mushroom enemy does not. If you want a free example.