Bike Pad

From the Super Mario Wiki

Bike Pads or Bicycle Pads are platforms found in the game Mario and Luigi: Superstar Saga. They have the appearance of two small yellow platforms with eyes. To use them, Mario and Luigi have to jump onto the panels, which will be lying on the ground on the edge of a cliff. Afterward, the brothers must alternate jumps to move the blocks across a chasm, reminiscent of bicycle pedals.