Spring Mario

Spring Mario is one of Mario's forms in Super Mario Galaxy and Super Mario Galaxy 2. In both games, he is able to transform into it by collecting a Spring Mushroom. In Super Mario Galaxy, the form first appears in the Toy Time Galaxy, and later in Beach Bowl Galaxy (only in the Purple Coin mission "Beachcombing for Purple Coins"). As Spring Mario, Mario is able to jump higher, but is no longer able to run. Instead, he simply bounces around the level. Using this form, Mario is able to bounce very high to reach items hidden in the air. It also grants him the power to climb very steep inclines in a slinky-like fashion. If Mario takes damage, touches water, or lands on a Launch Star or Sling Star, however, the form is lost. Mario can still Ground Pound in this form.

In Super Mario Galaxy 2, the Spring Mario form returns, behaving the same as it does in the game's prequel. Here, it makes its only appearance in Chompworks Galaxy in the "Spring into the Chompworks" mission.

Super Mario Galaxy Trading Card Description
''BOING! Here comes Spring Mario after he grabs a Spring Mushroom in the Toy Time Galaxy. Use the fun Mario transformation to jump higher than ever before - and jump jump everywhere for that matter (Mario can't run as Spring Mario). Using the Spring Mushroom, Mario will be able to find hidden items in the air and climb steep levels with ease.''

Trivia
In Wario Land II, Wario Land 3 and Wario Land 4, Wario possesses a similar form known as Bouncy Wario.