Kamenoko Shuriken

The Kamenoko Shurikens (かめのこ手裏剣; Turtle-Koopa Shuriken) are the Mutant Ninja Sentai Nokonokoman's weapons: those are normal with the central part decorated like a Koopa Shell. They use them after presenting themselves to Mario, Luigi, and Yoshi. Mario, using Yoshi as a human shield, makes the Kamenoko Shurikens hit his friend. After that, the Nokonokoman don't use them anymore, using instead their transformation technique.