Add up to 10 different Pokémon to your box and then press play. Watch as they grow, evolve, multiply, and eventually die leaving their offspring to continue the cycle. The kinds of Pokémon you add to a box can alter its appeal to other species and can greatly affect its resident's growth and breeding behaviours over time. Whenever you're ready, STOP the simulator then try a different combination of starter Pokémon.
The basic goal of the simulator is to encounter all the different species and forms of Pokémon using a single box and only a handful of starter Pokémon as seeds. Your starter Pokémon can be used to attract other similar species, and then those can be used to attract even more. Check your Pokédex after playing for a bit to see how many species you've registered so far!
Each species that lives in your box contributes to the global Type Appeal values in some way. Fire types, for example, attract other Fire types... but they also repel Bug, Grass, and Steel types due to their type-advantage over them. Likewise because Fire types are weak to Water attacks themselves, they may inadvertently attract Water type Pokémon to the box as well. All basic Pokémon influence a box's appeal values but fully-evolved and special or legendary Pokémon influence it a bit more.
Type Appeal values affect many things, but the most notable are evolutions and breeding. Some Pokémon may find a certain type more or less appealing, and may either evolve into or produce offspring with a new typing to compensate. If the appeal values are just-right, Pikachu can evolve into Psychic types, Ninetales can give birth to Ice types, and Gloom can decide to shed their Poison type to become pure Grass.
Most Pokémon grow and eventually evolve on their own, but some require very specific conditions to reach their next stage of development.
If you used PokéBox before it was upgraded to use SSL and be more secure, your old save data will not be seen by the current version of the app. Please use the dedicated migration page to push your data up into the cloud and then come back here to pull it back down again. Apologies for the inconvenience but thank you for your understanding.
If you have any questions or feedback about the simulator at all, please join us on Discord and let us know your thoughts. We look forward to hearing from you!