How do you get the secret codes in the Granite Zone on PokePark Wii?

In PokePark Wii: Pikachu's Adventure, to obtain the secret codes in the Granite Zone, you need to interact with specific characters that provide hints or tasks. Completing these tasks often involves mini-games or challenges. Once you successfully complete them, you can unlock the secret codes that grant access to special features or items. Be sure to explore the area thoroughly and talk to all characters to find these opportunities.