Here I will post every Monster Code so far. There’s another guide of this, but it’s lacking some codes. I’ll try to update the guide as soon as I can. If I’m missing any code please let me know in the comments.
How/Where to input Codes.
To introduce the codes and get the monsters, you can go to the barn in your family’s farm, talk to the box and select Code. Then you can copy/paste the codes listed below and hit enter (the monsters will be in the box). You can input as many codes as you want, and the monsters will have different stats, so you can get the monster you want/need all the times you need.
Monster Codes
Sprite
Name
Code

Hooclaw
PPGO34NJNN

Cobreo
PPHO34NJNN

Taupsy
IFSPIQIKNB OR PPIO34NJNN

Echelk
PPJO34NJNN

Frigidile
78MJNEYTYF

Ix
DGJDF8PNK5

Stamlanche
PPFO34NJNN

Molkuran
UMC3N7KDND

Crawkadaga
PPKO34NJNN

Blaze
GH45PLN789

Sentinel
KJW56UID42

Lumes
W23TYBV992

Icarus
8926FTYC9A

Icick
92QY3111BBQ

KingsPrimigon
KINGPRIM
Additionally
Dev made this announcement too, that for obtaining a monster you can trade with a fake tamer if you input six 9 as an ID. Here I leave the info:
Here’s a Chuk with a custom sprite I created, I called it Yuto! I guess it’s our first quasi-canon monster.
Want to get yourself one? Well there’s a playground rumor that if you trade and enter a tamer id of 999999 (six nines) you’ll trade with a phantom tamer and receive your very own Yuto-chuk.
One thing to keep in mind is that if you breed these monsters, they produce Tardigen. If this feature is well loved maybe we’ll add the ability to insert a whole crossbreed family in the future.
Final Words
I hope you enjoyed the guide. If you want to help me, I have a curator page based on Monster Taming games, that you can follow. I’ll leave the link here in case anyone is interested: Tamers Tavern
By Horse Luis