Go to the IDE settings and choose "Plugins" item in the list
Click "Marketplace" button on the top
Type "bitbucket integration"
Choose the "Bitbucket Integration" plugin and click "Install". If it's not shown, try to update the IDE to the latest version.
Restart the IDE
In the window appeared click on "Bitbucket Pull Requests" and choose "Evaluate for free" option
Click "Evaluate" and then click "Continue"
General Usage Instruction
Open your project in the IDE
You'll see "Bitbucket Pull Requests" tool window. For example, you can access it through menu: View | Tool Window | Bitbucket Pull Requests.
If you use Bitbucket Cloud, your repository should be already visible in the dropdown in the upper left corner of the tool window, so you just need to click on "Click to load pull requests" link or "Refresh" toolbar button.
If you use Bitbucket Server or DataCenter, click on the "Click to add repositories" link
If you use Bitbucket Cloud and don't see your repository, please check that you have Bitbucket Git remote configured: VCS | Git | Remotes...
If you have any problems or questions, please contact support