A sharp-shelled member of the Koopa Troop in the Super Mario Brothers universe. Spinys begin their lives as pointed eggs thrown from the clouds by a turtle called Lakitu. The Spiny Eggs rain down to Earth and hatch when they hit the ground, revealing the Spinys themselves. They march onward, never stopping. When they hit a pipe or block they turn around and reverse direction.

Spinys can not be stomped. They are only defeated by using a fireball, cape attack, Starman power, or being hit by a kicked shell. Despite their sharpness, Yoshi can also eat them without a problem.

Spinys turn into grey coins when exposed to a grey P-Switch.