You’re standing in the DigiLab. It’s quiet, except for the hum of the machines and Mirei Mikagura staring at you with that unnerving gaze. You’ve got a handful of Scan Data, a bunch of "Baby" level blobs, and a massive headache. If you’re trying to track down Digimon Cyber Sleuth all Digimon, you quickly realize this isn't just a "catch 'em all" situation. It’s a math problem. A long, grindy, rewarding math problem.
Most people jump into Digimon Story: Cyber Sleuth—or the Complete Edition—thinking they’ll just grab an Agumon and breeze through to Omnimon. Then they see the ABI requirements. They see the CAM percentages. Suddenly, that straightforward evolution path looks like a spiderweb designed by a madman.
Honestly? That’s the charm. Unlike other monster-collectors where you’re stuck with what you catch, Cyber Sleuth lets you turn a literal piece of pink sludge into a literal god. You just need to know how the "Digivolve" and "De-generate" loop actually works.
The Massive Roster and the Complete Edition Difference
Let’s get the numbers straight because there’s a lot of misinformation floating around Reddit and old GameFAQs threads. If you are playing the original PlayStation Vita version released back in 2015, you’re looking at a base roster of about 240 Digimon. But almost nobody plays that version anymore.
If you’re on Switch, PC, or playing the Complete Edition on PS4, the game merges the rosters of the original Cyber Sleuth and Hacker’s Memory. This bumps the total to 341 unique Digimon.
That list covers everything from the classic 1997 virtual pet icons to the weird, obscure additions like the Sistermon duo or the terrifying Arcadiamon forms. It’s a massive jump. You aren't just looking for a checklist; you’re looking for a strategy to navigate a library that spans the entire history of the franchise.
Why You Can't Just Find Them All in the Wild
Here is the thing: you don't "catch" Digimon in this game. You encounter them, your Digivice automatically scans them, and once you hit 100% (or 200% for better stats), you "convert" them in the Lab.
But you’ll never find a Royal Knight just hanging out in a digital alleyway waiting to be scanned.
The rarest entries in the Digimon Cyber Sleuth all Digimon list are locked behind specific walls. Some require "Digi-Eggs" for Armor Evolution—looking at you, Magnamon and Flamedramon. Others are locked behind the Great Challenges, which are arguably some of the most brutal boss fights in modern JRPGs. You beat the Royal Knight, you get the "permission" to evolve into them. No shortcut. No easy way out.
The ABI Trap: What Most Players Get Wrong
If you want the heavy hitters—the Lucemon SMs and the Belphemon RMs of the world—you need ABI. ABI is "Ability," a stat that doesn't go up when you level up.
It only goes up when you evolve or devolve.
This is where the grind for Digimon Cyber Sleuth all Digimon becomes a cycle. You take your Greymon, you level him to 30, and then you force him back down to Agumon. Why? Because that jump backward boosts his ABI. You might have to do this five, six, seven times to hit the 120 ABI required for the top-tier Ultra (Mega II) Digimon.
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It feels counter-intuitive. Why make my monster weaker? Because the ceiling for their power increases every time you do it. A Digimon with 0 ABI is a glass cannon that can't even learn its best moves. A Digimon with 200 ABI is a monster that can solo the end-game bosses.
The PlatinumNumemon Strategy
You can't talk about completing the Field Guide without mentioning the "poop" strategy. It sounds ridiculous. It is ridiculous.
PlatinumNumemon is objectively one of the ugliest things in the game. It’s a silver slug with wings. But its passive ability, "Tactician," multiplies the XP you get from battles. If you stack three PlatinumNumemon in your active party and equip them all with "Tactician USBs" (which you get from the 1,000 Yen Farm development command), a single random encounter in the late-game dungeons can jump a Level 1 Digimon to Level 60 in seconds.
This isn't just a "pro tip." It's a requirement. If you try to see Digimon Cyber Sleuth all Digimon without using the PlatinumNumemon XP farm, you will be grinding for hundreds of hours. With it? You can fill out the Field Guide in a weekend.
Digivolution Requirements: More Than Just Levels
Getting every Digimon requires meeting specific stat thresholds. This is where the DigiFarm comes in. You’ll see a requirement like "SPD 150" or "INT 140," but your Digimon is already at Level 99 and only has 130.
You haven't failed. You just need to train.
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By placing a Digimon in the Farm and assigning a Leader with a specific "Personality" (like Nimble for Speed or Brainy for Intellect), you can force their stats to grow beyond their natural limits. The amount of extra points you can add is tied directly to—you guessed it—their ABI.
Formula: $50 + (ABI / 2)$.
If you have 100 ABI, you can add 100 extra points to your stats. If you have 0 ABI, you only get 50. This is the nuance that separates casual players from the ones who actually unlock the likes of Mastemon or Imperialdramon Paladin Mode.
The Hacker's Memory Exclusives
If you’re playing the Complete Edition, remember that some Digimon are only available after you’ve progressed significantly in the Hacker's Memory side of the story.
The "Hudiemon" evolution is a perfect example. It's tied deeply to the narrative of Erika Mishima. You won't find it in the base game's story. You have to finish the Hacker's Memory campaign to even think about adding that specific entry to your collection.
Missing Entries? Check the Cases
Sometimes you’ll look at your Field Guide and see a gap between two Digimon you already have. You’ve evolved everything, you’ve farmed everything, but there’s still a blank space.
Check the DigiLine messages and the Offline Colosseum.
A few Digimon are only "unlocked" as evolution options once you've defeated them in specific side-quests or "Great Challenges." The Seven Great Demon Lords, for instance, won't show up in your evolution trees until you've faced them in their respective DLC cases (which are built into the Complete Edition).
Also, don't ignore the "Victory Uchida" locations. This NPC wears a V-mon mask and hides in different chapters. He gives out unique items like the "Beelzebumon Blast Mode" evolution item. Miss him, and you might find yourself waiting until New Game Plus to fix the mistake.
Actionable Steps for Completing Your Roster
Completing the list of Digimon Cyber Sleuth all Digimon is a marathon. To do it efficiently, stop playing "fair" and start playing smart.
- Build the XP Engine Early: Get three Keramon and evolve them into PlatinumSukamon as soon as you hit the mid-game. Eventually, replace them with PlatinumNumemon.
- Farm the USBs: Put 10 "Developer" personality Digimon in a Farm Island, fill it with "Developer's Patch" items, and run the 1,000 Yen command. Save your game with 1 minute left on the timer. If you don't get a Tactician USB, reload.
- Watch the Personalities: Use "Patches" from the EDEN Entrance shop to change your Digimon's personality. If you need more ATK, make them "Fighter." If you need more SP, make them "Lively."
- Degenerate Often: Don't be afraid to go back to the Rookie stage. It's the only way to build the ABI needed for the Ultra-level fusions.
- Clear the Great Challenges: You cannot finish the guide without doing these. They open up in Chapter 19. Bring a Digimon with "character reversal" (like PlatinumNumemon's move or various status skills) because the Royal Knights cheat.
Filling the Field Guide isn't just about power. It’s about seeing the weird, neon-soaked evolution of a franchise that isn't afraid to be complicated. Once you see that "100%" on your save file, you'll realize the grind was actually the best part of the game.
To maximize your efficiency, prioritize unlocking Digimon with "Piercing" attacks like Lilithmon, Beelzebumon BM, and Alphamon Oryuken. These Digimon ignore the enemy's DEF or INT stats, making the high-level boss fights—and the subsequent grinding—significantly faster. Focus on getting one of these "Piercers" to 200 ABI first, and the rest of the Field Guide will fall into place much easier.