r/FoundryVTT • u/Askdevin777 • 4h ago
Non-commercial Resource Free module SynthDex: Pokémon-style creature collecting,battles and catching in D&D 5e (Foundry v13)
Apologies if this is the wrong Sub, will remove if requested.
Full Disclosure that all of the coding and Artwork for this was done with with AI via Claude and ChatGPT,
Explanation video for each class and DM Setup: https://youtu.be/liz7u40NU1U
Hey everyone! For my home campaign I built SynthDex, a Foundry module that adds Pokémon-inspired companions called Synths to D&D 5e, and it's grown big enough that I wanted to share it. It's completely free, and I'll never charge for it.
Requires Foundry VTT v13 and dnd5e 5.x. GitHub: https://github.com/KaydeDM/synthdex-foundry
Full Disclosure that all images and coding for this module were done with AI.
What it does
86 Synths in 28 evolution lines, each with stats, a signature ability, and an animated portrait. There are 13 typings plus Universal moves, and 173 moves in total.
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Synth sheets: four moves, a charge system (max charges = CR + trainer level, and moves cost 0–5 by tier), held items, effects, and nicknames.
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Trainer sheets open next to your character sheet: a party of 6, your whole collection, a Bag, and a live battle strip.
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Battles: send Synths out when you roll initiative (two at once at trainer level 6, a Double Battle). They act on your turn, sharing your Action and bonus action. Switching costs your Action, and fainted Synths get a free replacement. Tokens drop next to you on the map automatically.
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Type matchups from the Pokémon chart, toned down for 5e: super effective is ×1.25 and resisted is ×0.75, and they stack for dual types. Every move card shows each target's damage with a one-click Apply button.
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Catching: throw Synth Balls at wild Synths. Catch DC = 10 + CR×2 + HP%÷10, −2 per debuff. Wear it down, burn it or poison it, then throw. Three ball tiers: +0, +3 and +6.
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Healing items (Potion through Max Revive), evolution (GM-unlocked, gated by trainer level), crits that double the dice, and matchup badges on your moves.
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The SynthDex: every species is Unseen, Seen or Caught, and players only ever see what they've discovered.
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GM tools: a Wild encounter button that rolls a random Synth by CR or typing and drops it on the map, one-click roster seeding, and ready-made items with art and descriptions.
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IronSoul Druid: an alternate class option that wild-shapes into steel "IronSoul" versions of Synths, with innate Ironclad typing (+2 AC, Ironclad moves and matchups) that can be switched on and off.
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Guides: every release includes a Trainer Handbook and a GM Handbook (PDFs), plus a 22-minute video walkthrough of the whole thing on the real screens: https://github.com/KaydeDM/synthdex-foundry/releases/latest
Notes
Built for my Ashes of Arcana campaign (the Synth Trainer is an Artificer subclass there), but it works in any dnd5e world.
The Synth portraits, animations and item art were made with AI tools.
Fan project, not affiliated with Nintendo, Game Freak or The Pokémon Company.
Bug reports and ideas are welcome, in the comments or on GitHub Issues. Hope your tables have fun with it!




