Demon Fusion Search Tool
This is a demon fusion simulator for Devil Summoner: Soul Hackers. Choose a race, and tap on the demon name for which you want to display the fusion recipe.
As it's newly created, the usability is still a work in progress. If you have any features you'd like to see or suggestions, please reach out to us on Twitter.
Here's a brief description of the tool.
Concept of this Tool
This tool serves as a reverse lookup for demon fusion in Devil Summoner: Soul Hackers. When you select a demon, it displays all the fusion patterns for both 2-way and 3-way fusions.
Its standout feature is the skill inheritance filter.
During this era of the Megami Tensei series, the flexibility of skill inheritance was limited, and it followed intricate rules based on the combination of material demons. I recall spending significant time consulting guidebooks just to figure out how to inherit a single skill like Tarukaja.
This tool alleviates such challenges. Even after successfully inheriting the desired skill, it liberates users from the torment of wondering, "Is there a better fusion pattern?"
I adhere to the philosophy of,

I fail to see the significance of a perfect tool, you know.
and have been developing with this principle. I have never been entirely satisfied with my tools, but I believe that, at its current stage, this tool can rightfully be called a

God Tool!
I believe it with conviction.
Certainly, there are issues with the user interface and bugs, but for Soul Hackers users, it is likely to demonstrate disruptive power.

Probably, just probably.
If an unbelievable recipe is discovered and sets a new speedrunning record, it would bring tears of joy to my eyes.
Issues with the Tool
Insufficient Testing
This tool is a web adaptation of an offline tool I created in 2013.
While I likely thoroughly tested it back then, this time around, I've only done minimal testing.
However,

So far, no mistakes have been found.
If you find any errors, please report them on Twitter so that they can be fixed.
Fusion Results with All New Demons Obtained for 3DS Version
This tool calculates fusion results based on the condition of having acquired all new demons in the 3DS version. Unfortunately, this makes it slightly less user-friendly for players of the Sega Saturn or PlayStation versions, or 3DS players who haven't engaged in streetpass communication.
For instance, due to the availability of Deity Odin (3DS), fusion results might deviate from what would typically result in the creation of the demon Deity Baal. This can lead to cases where desired skill inheritances cannot be achieved.
This issue arises from constraints in data and processing capacity, making it challenging to cater to individual environments or new demon unlocking conditions.
While fine-tuning for specific cases may be limited, I'm considering adjustments to provide more benefits for a broader audience.
Fusion Combination with Entity and Zealot in 3-Way Fusion
As of 2013, it has come to my attention that there was a bug in handling Entity and Zealot.
I have addressed this promptly, but not only may issues persist with Entity and Zealot themselves, but there is also a possibility of other fusion results being affected.
Issues with Skill Inheritance
The prominent feature of this tool, the search for inherited skills, currently calculates all material demons with "no skill inheritance" status.
I acknowledge that this can be inconvenient, and I'm contemplating whether it's feasible to calculate the skill inheritance part in real-time. However, considering that Cosmo Zombie has a staggering 63,000 recipes, it's unclear if calculating this number in real-time would provide a satisfactory user experience. There is a possibility of addressing this after conducting thorough testing.
There is a request for a feature to find the inheritance destination for Megidolaon Pixie, and I plan to experiment with that first.
Irregular Fusion Results
Different Demons in Fusion Results (Same Race)
In the 3DS version, the fusion results within the same race may vary depending on the unlocked status of additional demons.
The calculation for fusion results of traditional demons will be adjusted by considering them as if the additional demons are not present, aiming to bring the results closer to those of the SS and PS versions. Planned Update.
Different Demons in Fusion Results (Mismatched Races)
This is anticipated to occur in cases of 3-way fusions resulting in special fusions or becoming entities like Entity and Zealot. After confirming the behavior on the actual device, we plan to address this.
For other cases, it might be a simple bug. If you could report it on Twitter, we would be able to address it.
Mismatched Inherited Skills

Are your demons inheriting healing magic like Dia from material demons?
This tool calculates inherited skills based on the assumption that all demons are in their "natural" state, i.e., without any inherited skills.
When aiming for specific inherited skills such as Tarukaja or Tetrakarn, which are often prioritized over healing magic, having healing magic already inherited may obstruct the process.
This tool also allows you to search for fusion patterns with "no inheritance," so consider recreating material demons through that feature.

Personally, I believe it's better to register to the compendium all demons without any inherited skills.
If you encounter any issues, it could be a bug, so please report it on Twitter.
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I've put all my genius into this!
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It is time for you to shine!
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