You are very unlikely to need this patch, unless you're wanting to run the USA Trog! game on your physical Famicom, via something like an Everdrive or flash cartridge.
This patch changes one byte of the ROM, making it possible for player two to join the game (and continue when lives are exhausted) by using the A button, instead of the Start button (which a Famicom lacks for the player two controller).
Database match: Trog! (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: DA36075188C98C0434BC78CE0554942948F4228E
File CRC32: DD6141DF
ROM SHA-1: 29CA7CC398B855472C9D94E7581BE8288468382B
ROM CRC32: EE6892EB