PicMo is divided into several different packages. Depending on your use case you may not need all packages. This helps keep your bundle size down.
The packages are:
The core picker package. This one is required for all other packages to work. It allows you to create inline pickers using native emoji rendering.
An add-on package that adds support for creating popup pickers.
An add-on package that adds support for rendering emojis using the Twemoji library.