Pokemon 3D is a free game for the Windows operating system, developed by Gamefreak. It is similar to the Nintendo DS and allows the player to use the DS camera to take pictures of real-world Pokemon and then battle them using a strategy guide. The software was released as freeware and as a download. There is no option to purchase the game or get a free download. You will need to download the application from the internet to enjoy the action.
When you download the free software, you will be asked to enter your email address. You will then be sent a download link that will need to be downloaded to your computer. The link will have a file named "Pokemon.exe", which you will need to extract. You can then copy the files that are inside of the file and install them into your computer. You should be able to start playing the game in a few minutes, as you will see the Pokemon in the background.