Why does my Pokemon platinum game crash after i activate a code and turn it on?

Your Pokémon Platinum game may crash after activating a code due to several reasons, such as using an incompatible or corrupted cheat code, which can interfere with the game's normal operations. Additionally, if the code alters game data in a way that the game cannot process, it can lead to crashes. Always ensure that the cheats you use are compatible with your specific version of the game and that you are using a reliable cheat device or emulator. To troubleshoot, try disabling the code or using a different one to see if the issue persists.