From the Super Mario Wiki
Springer is a more powerful version of the enemy Shyster and are members of the Smithy Gang in the game Super Mario RPG: Legend of the Seven Stars.
Springers are clad in green cloaks and are found in Smithy's Factory. They are much more powerful than Shysters. Like Shysters, they are created by Smithy. They are usually accompanied by Puppoxes in battle.
Names in other languages
|Possibly a portmanteau on "Heiho" (Shy Guy's Japanese name) and "power."