Super Smash Flash 2 Demo

In order to test everything coded within the game before the final release, Cleod9 releases to public, after a certain period of time, the Super Smash Flash 2 Demo, a playable beta version of Super Smash Flash 2. New versions of the demo usually include several new features, such as new characters or stages, and many bug fixes.

Developer Demo
There is a test demo for exclusive use by SSF2 Devs and SSF2 Balancers called Developer Demo, or devmo for short. Its main function is to check traits of a demo before its public release, and thus removing a big number of serious bugs, adjusting the moveset of characters, making sure a stage's layout works correctly, etc. Because of its exclusivity, Devs usually enjoy mocking non-devs in the McLeodGaming Forums by showing them screenshots from the devmo, as well as spoiling them.