How the collection grows
Search Gaia for wild Stackmon and open booster packs to add more cards. Captured creatures are not only combat units: assign them to gather materials and automate jobs around Harmony.
What the 100+ count includes
The advertised total includes evolutions plus rare and legendary editions. Do not read it as 100 unrelated base creatures, and use the in-game Stackpedia when you need the live completion count.
Where to look up individual Stackmon
Stackpedia currently has profiles for Flowf, Gralit, Platy, Frogow, Toadox, Cahopp, Pinpaca, Waxindle and Pomball. Its sightings list also helps you find names such as Spindle, Mothold and Sootling before fuller details are available.
What the Steam achievements add
Steam includes goals for seeing and capturing every Stackmon; completing the Fire, Water, Plant, Rock, Thunder, Aether and Neutral sets; breeding once; and creating a foil. Use the achievement tracker to turn those into a collection checklist.