Here is Switch Weapon patch for Rockman 2/Mega man 2.
How to use it:
- Select: Normal switch
- Down + Select: Reverse switch
- Select + Start: Switch to Buster directly
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