The Spin Jump is a move able to be performed in various games. It was introduced in Super Mario World.
Spin Jumps were introduced in Super Mario World. They could be used to bounce off of certain enemies that couldn't be jumped on with a normal jump (like Spinies and Piranha Plants) or destroy others in one hit (like Rexs and Dino Rhinos). If in Super Mario or Luigi form, it can destroy Rotating Blocks. If in Fire Mario or Luigi form, fireballs will be thrown in both directions while spinning. If a Cape Feather has been obtained, the cape will swing during the jump.
In Super Mario Sunshine, a spin jump can be performed by spinning the analog stick, then jumping. It could also be performed by spinning the control stick while in midair. The former provides greater heights than most jumps. In addition, spinning will get rid of Goop stuck to Mario. Mario can squirt water in many directions while Spin Jumping.
The Spin Jump was one of the first Bros. Actions learned in Mario & Luigi: Superstar Saga. It was taught by the Starshade Bros. in the Stardust Fields. It is activated with Mario in the back. It allowed the bros. to fly through the air for a short period of time. Flying into a mini-tornado allowed the Bros. to fly further. In Joke's End, the steam rising from the broth can be used to create tornados if a Spin Jump is performed while in it. Spin Jumps can also be used to move up slopes faster than walking.
Spin Jumps return in Mario & Luigi: Partners In Time, where they are largely similar to their function in Superstar Saga. It is the first move taught by the Toadsworths. It has lost the ability to move up slopes quickly. When the move is taught by the Toadsworths, spinning into a baby will initiate a Baby Spin.
Spin Jumps are in Mario & Luigi: Bowser's Inside Story where they are largely the same as in Partners in Time.