This is a modification of Kirby's Adventure that was made 5 years ago to troll someone else with / practice reading ASM, and then sat on until now.
The premise, as those that have played Devil May Cry can probably guess, is pretty simple: Kirby has been set to start with 1 health and 0 lives. Collecting Energy Drinks and Maxim Tomatoes do not restore health. Beating a boss does not restore health. Collecting a 1-up does not give an extra life. All minigames that normally give 1-ups do not do so. Enemies have not been modified in any way. Consequently, each individual level and boss must be completed without taking a single hit. Arguably difficult, especially on some of the later levels and bosses, but absolutely doable.
Database match: Kirby's Adventure (USA) (Rev 1)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: F324E7C8C3AD102ECDCCA011ECC494F6F345D768
File CRC32: 9EFD5757
ROM SHA-1: 118307DA6C77A592F0884BAAD14120301D8D3A1B
ROM CRC32: 5ED6F221