Simply entering a code is often not enough; you must also prepare Dolphin's "virtual hardware" to handle the increased load. 60 FPS master list - Dolphin Forums
Though older, these remain widely used and are sometimes more compatible with certain builds. 2. Setting Up Your Emulator dolphin emulator 60 fps cheat code
These are the preferred format for modern Dolphin builds due to their flexibility and stability. Simply entering a code is often not enough;