Here is a ROM hack for Wild Gunman which changes:
Database match: Wild Gunman (World) (Rev 1)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 2A5C4F43A56A4C7A4CA73C4F3EE204AE0FBD8157
File CRC32: 330F53EE
ROM SHA-1: 598958B8253CB1E6319D351B8FC50A169D863472
ROM CRC32: 5112DC21