You can create Pull Requests across two branches as well as two forks of a repository.
Pull requests between branches is a perfect way to conduct code reviews when working a team.
Keep your hands on the keyboard.
Bitbucket has a powerful complement of keyboard shortcuts to put important actions at your fingertips.
With both versions of the file shown in full with synchronized scrolling, Bitbucket helps you more quickly grok what has changed, making code review and collaboration that much easier.
Bitbucket supports the two most popular DVCS tools in the world: Mercurial and Git.
Whichever system you perfer you can keep all of your code in Bitbucket.