Here's why:
* Different Platforms: Pokemon SoulSilver is a Game Boy Advance (GBA) game, while the Wii is a completely different console generation.
* No Direct Connectivity: GBA games cannot connect directly to a Wii. They use separate cartridges and have different hardware and software systems.
* Virtual Console: While you can play some Game Boy Advance games on the Wii through the Virtual Console, Pokemon SoulSilver is not one of them.
Therefore, there's no way to play Pokemon SoulSilver directly on a Wii, or connect the two systems together.