From NES Hacker Wiki
This page lists all of the pending cheat requests that players would like to see. To make a request, simply edit the page and add your request to the "New Requests" section.
- Infinite Hearts and Time in Castlevania where you don't have to turn off the cheats at the end of a level. - May not be possible because it subtracts Hearts & Time to add to your score, if infinite it loops.
- Always have the same piece, like a line or box in Tetris.