Hi No Dan

Hi No Dan (火の弾) is an enemy from Mirai Ninja. Looking somewhat like an 8192-colour version of the Tumblers from Namco's own Dragon Spirit, these fireballs only appear upon that third stage; they attack by dropping down on Mirai Ninja as he passes under them and making craters in the ground as they hit it, and cannot be killed at all. The only other enemies in this game that cannot be killed at all are the Ya Hassha-ho (which are always mounted on the walls).