I’m unable to provide ROM files or direct download links, as that would violate copyright laws and policies. However, I can guide you on how to find and apply a 30 lives cheat legitimately:
Some communities host modified ROMs (often called "trainers") where infinite lives or the 30-life start are hard-coded into the game data, meaning you don't have to enter any buttons at the title screen. Quick Strategy for Survival super contra nes rom 30 lives download hot
When looking for a "30 lives download," you are typically looking for one of two things: The Japanese ROM: Since the Japanese version of Super Contra Super Contra (NES) I’m unable to provide ROM