Thanks. Make sure the checksum box is getting checked automatically. If not then check it. If you are still having grief paste the full ROM name and codes you are using. That game is from Konami and they do red screen on failed checksums.
I agree with what you said in the original post. I don't really care about most Game Genie codes. I just want unlimited lives so that I ca play through until the end. I sometimes want unlimited health for games that put you way back when you die, but the TMNT beat'em up games don't do that so unlimited lives works just fine. I hope to play this game with my son like you currently do, but he is too young at the moment to play any games.
I appreciate you helping me out with this. I was pretty sure that I had the checksum box checked, but just to be safe I tried it again last night, but still no luck. The game I'm specifically trying is TMNT The Hyperstone Heist, but I'm not really sure what you mean by full ROM name, so if you could clarify, I would appreciate it.
Here are the Game Genie codes I was trying to use.
ADCT-CAGC Infinite lives„player 1
ADFA-CAB2 Infinite lives„player 2
BXYA-CA6L Deadly attack uses no life points player 1
BXYT-CA2G Deadly attack uses no life points player 2
However, I would be happy with just infinite lives for player 1.
Thanks again.