This is a version of Thirteen 1355's "Refill Weapon after Death" hack made for Rockman 2.
"This patch is meant to make the game a bit easier and less frustrating. Applying this patch to Rockman 2 will make the weapon energy of all weapons restore fully whenever a life is lost. This mechanic is officially applied in Rockman games for the PS1 and later."
All credit goes to Thirteen 1355 for the original hack: https://www.romhacking.net/hacks/4682/
Database match: Rockman 2 - Dr. Wily no Nazo (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: FB51875D1FF4B0DEEE97E967E6434FF514F3C2F2
File CRC32: 30B91650
ROM SHA-1: 3E9DC769E1B63E73834786EC7FE9EDE7E706C72F
ROM CRC32: 6150517C