Conversion List

Sacred Water

Wither Skeleton -> Skeleton
Powered Creeper -> Creeper
Cave Spider -> Spider
Ghast -> Squid
Endermite -> Silverfish
Witch -> Villager
Elder Guardian -> Guardian
Blaze -> Bat
Zombie Horse -> Horse
Killer Rabbit -> Rabbit
PigZombie -> Zombie
True Creeper (Creepier in 1.12+) -> Peace Creaper
Zlama -> Llama
iSheep -> Sheep
Hellhound -> Wolf

Cursed Water

Skeleton -> Wither Skeleton
Creeper -> Powered Creeper
Spider -> Cave Spider
Squid -> Ghast
Silverfish -> Endermite
Villager -> Witch
Guardian -> Elder Guardian
Bat -> Blaze
Horse -> Zombie Horse
Rabbit -> Killer Rabbit
Zombie -> PigZombie
Llama -> Zlama
Sheep -> iSheep
Wolf -> Hellhound

Forgotten Water

Creeper -> Void Creeper