The game developers specifically chose to omit cheat codes from the Wii version to encourage a more focused and balanced gameplay experience. This is likely due to the limited input options of the Wii Remote compared to keyboard and mouse controls.
It's important to note: Using cheat codes can significantly alter the intended gameplay experience and may even lead to glitches or instability within the game.
Instead of searching for cheat codes, I encourage you to explore the game's various mechanics and enjoy the challenge of building your island paradise without relying on cheats.
If you're looking for tips and tricks to advance in the game, you can find plenty of resources online, like forums and walkthroughs, that offer helpful advice and strategies.
Remember, the true fun of The Sims 2 Castaway lies in the creativity and resourcefulness you bring to your island adventures!