Dragon Quest Monsters: Joker | 3 Professional [de...

If you are looking for a physical "paper" book, there are two primary official Japanese publications:

Since no official English paper manual exists, the community has created comprehensive digital "papers" and spreadsheets to translate the game's complex systems: Dragon Quest Monsters: Joker 3 Professional [De...

: The Dragon Quest Fandom Wiki provides a full digital bestiary categorized by monster families (Slime, Dragon, Beast, etc.). If you are looking for a physical "paper"

: You can find translated lists of Skills and Traits on platforms like Scribd, which describe the effects of various abilities like "Crafty Sapper" or "Critical". Dragon Quest Monsters: Joker 3 Professional [De...

: A specialized guidebook focusing on the game's world and mechanics, often found on secondary markets like eBay . Digital Reference Guides (English)

You can find these Japanese physical guidebooks from international retailers: