Here's why:
* Pokemon Ranch is a Wii game. It was designed to be played on the Wii console.
* DSi systems are designed for Nintendo DS games. While the DSi has Wi-Fi connectivity, it's not compatible with Wii games or services.
How to transfer Pokemon to Pokemon Ranch:
You can transfer Pokemon to Pokemon Ranch using a Nintendo DS game with the "Pokemon Transfer" feature.
* Pokemon Diamond, Pearl, and Platinum: These games allow you to transfer Pokemon to Pokemon Ranch using the "Pokemon Transfer" feature. You'll need a Wii and a copy of Pokemon Ranch to do this.
* Pokemon Black and White: These games use the "Poke Transporter" feature to transfer Pokemon to Pokemon Ranch. Again, you'll need a Wii and a copy of Pokemon Ranch.
Let me know if you have any other questions!