This is a sprite hack of Ninja Gaiden. The main character Ryu has been replaced by Leonardo from TMNT. Most of the humanoid enemies have been replaced with Foot Soldiers and various stage enemies are inspired by enemies found throughout the NES TMNT game. The bosses are the some of TMNT's classic characters like Rocksteady, Bebop, Baxter Stockman, Mechaturtle and of course Shredder and Krang. The player ammo/ninpo has been replaced by pizza as well as the Fire Shield and the Art of the Fire Wheel subweapon. This is purely a sprite hack just for fun, no game mechanics have been changed.
Database match: Ninja Gaiden (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 282C846DDBE968CC5E4D1ADC56DC9B8E3BEF4753
File CRC32: 80D3B95E
ROM SHA-1: 15F245161179AB1959B7DC20E82ADD024D23AA3D
ROM CRC32: 7C4A72D8