Both of these can provide you the guidance that you need to get your codes working. If you are using the Dolphin Gamecube Emulator and struggling to figure out how to get these codes to work, look no further! Check out my How to setup Action Replay Codes on Dolphin or my How to setup Gecko Codes on Dolphin guides.
If you're looking for the UK Action Replay codes for Crash Bandicoot then check out that guide instead. These are all the codes that I know of for the US version of Crash Bandicoot: The Wrath of Cortex for Nintendo Gamecube. GameBase App: Emulated PSP, NDS, N64, SNES, GBA, NES, GBC, PCE, Genesis, GB, SMS, 2600, NGP, MSX, MSX 2 games on you Android Devices.
This will warp you to the end of the level. Crash Bandicoot: The Wrath of Cortex US Action Replay Codes In Level 4: Wizards and Lizards, as soon as you hit the stop watch to start the time trial, hit select.