Plugin: Allow only Zombies to spawn on the server Have zombies have a movement speed equivalent to a player running Post here if you are interested
created something similar for this request http://forums.bukkit.org/threads/custom-zombies.260193/ download it here: http://dl.geekxboy.net/download.php?file=SuperZombies.jar Or the newer version allows pigs, cows, chickens and sheep to spawn too: http://dl.geekxboy.net/download.php?file=SuperZombies-v1.5.jar