The official version of Shinron/Shin long no Nazo can be a bit difficult for both players old and new. It contains a game play mechanic where your health slowly drains as you play the level, even when not being hit. This patch stops that from happening only allowing you to take damage from things that can actually hurt you. It should work on most if not all versions of this game.
Database match: Dragon Ball - Shen Long no Nazo (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: F9F24D662601B6031F979470B84F41395713241A
File CRC32: 46D9D53D
ROM SHA-1: 68D2E5453044D4DB2D8438DFD1BF977F134CFD9A
ROM CRC32: 9552E8DF