
note The Switch remake made the dungeon colorblind-accessible by adding a shape to each color (square for blue, etc.) and removed its gatekeepers. Trying to get past the skeleton guards on a regular Game Boy will have them blocking the way and even if you do manage to get past them, trying to play through the colors gimmick without any actual color would be too frustrating to attempt. The DX version also has an exclusive dungeon designed for the Game Boy Color and it has its enemies and puzzles based on colors. Most people chose to save this one for the end of the game when they didn't need to go into the shop again anyway.

In extreme cases, the game can permanently 'brand' the player's save file with some kind of designation to indicate the use of cheat codes (some games can erase their save file outright). These countermeasures can vary from simple messages and reminders that constantly remind (and hopefully embarrass) the player about not playing by the game's intended rules, to more serious measures like denying access to certain features (bonus content, achievements, etc.) while cheats are in effect. Many video games have measures built in to punish the player for cheating (whether by built-in cheat codes or external cheating/hacking devices).
