Many are just made from different size squares/rectangles turned into cubes.
creeper doll patterns on pinterest:
https://www.pinterest.com/pin/545780048567853078/
youtube video tutorial (with measurements and instructions to make your own pattern) - creeper doll:
https://www.youtube.com/watch?v=HrsC8y3s6Gg
here are some stuffed amigurumi crochet zombies:
https://en.amigurumitariflerim.com/m...-free-pattern/
here is a creeper doll tutorial:
https://www.instructables.com/Minecr...-Creeper-Doll/
geek art creeper plushie pattern:
https://geekartgallery.blogspot.com/...r-plushie.html
free crochet patterns for stuffie minecraft sheep, pig & cow
https://amiesami.blogspot.com/2013/0...w-pattern.html
already made minecraft stuffies from WM (ideas to make your own?):
https://www.walmart.com/browse/toys/...Q6TWluZWNyYWZ0
hope this helps.
good luck.