Walks around the stage — throw him at your opponents!
Mr. Saturn is an item in Super Smash Flash 2. It was confirmed in a picture at McLeodGaming in the announcement about Ness and Saturn Valley. It was later confirmed to appear as an item on the Smash Flash DOJO!!. Mr. Saturn is often seen as a joke item due to the low amounts of damage it deals when thrown, it can, however, break shielding. In Super Smash Flash 2, Mr. Saturn appears to be akin to their Super Smash Bros. Brawl counterpart, but as a small easter egg, it may trip every now and then (a reference to a certain Mr. Saturn found in Mother 3). Also, when attacked, they will sidestep (instead of getting knocked back like in Super Smash Bros. Brawl). Several Mr. Saturns also appear in the stage Saturn Valley.
The SSF2 DevDamian confirmed the existence of Frank the Saturn, a background Mr. Saturn that will make photos. Damian explained that this was a reference to the photo guy found in EarthBound, the name Frank comes from the protagonist of Dead Rising; Frank West (who is also a photographer). When members of MG asked Damian why Frank the Saturn was there, Damian replied with "Call it Damian humor."
Mr. Saturn's will still appear in Saturn Valley, even if items are turned off.