Find the release for your OS under latest releases.
Fakemon.Creator.exe is for Windows
Fakemon.Creator.OSX.zip is for mac, unzip it first.
You might have to trust it before your OS want's to run it.
As there is a lot of fields to fill I recommend that you start with a similar Pokémon or Move. You do this by going
File -> Open Pokemon or File -> Open Move, this will list all the currently available Pokémon/Moves.
To make your custom moves and Fakemons be available for other Fakemons you have created you need first to save the package.
- Make sure everything in your package that it needs to be really is there.
- Then send the
*.fkmnfile to pokedex5e@gmail.com as an attachment. The subject should be "Pokemon Package". - Wait for it to be approved¹
By submitting a package created with Fakemon Creator you are agreeing to that it is under the MIT License and can be distributed freely under it.
¹ I will have to check the content and make sure if follows Apple and Google's rules for user content (sorry no vulgar language or images), it will then be added to the Fakemon Packages which should make it available in the app.