"Cheats from JM" — Need Clarification

"JM" is ambiguous. Could refer to:

• Game Title: Jet Moto, Jet Set Radio, Jumpman, James Bond, Jurassic Park, Just Cause, Jedi Knight, Jackie Chan...
• Person/Group: JM (YouTuber), JM Gaming, JMods, JM Cheats...
• Platform/Device: Jailbroken Mobile, JTAG, J-Runner...
• Cheat Device: GameShark/CodeBreaker/Action Replay — no "JM" model.

Help Me Narrow It Down

Tell me:

1. What game (or games)?
2. What platform (PS1, PS2, PS3, PSP, Xbox, PC, Mobile, etc.)?
3. What type of cheat (infinite health, unlock all, level skip, item codes)?
4. Where did you see "JM"?

With details, I can find the exact codes or explain why they don't exist.