This hack removes color emphasis bits at PPUMASK $2001, which was used in this game, making picture bright and colorful as it should be.
Database match: Lethal Weapon (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 48CC6CF036BF9C1D3BD491365455B8378A104E52
File CRC32: 1DC4915B
ROM SHA-1: AEB92FCFE3E757C3D52C99FAB6ECA5A50D59F174
ROM CRC32: 7077B075