Nice.
Wii has a very good catalog of Sonic games:
- Sonic Unleashed
- Sonic Colors
- Sonic 4 Episode 1 (it has three different versions on Wii: Prototype, Beta, and Retail)
- Sonic CD (via Homebrew)
- Sonic Mania (via Homebrew)
- Sonic and the Secret Rings
- Sonic and the Black Knight
- Sonic Riders: Zero Gravity
- Sonic & Sega All-Stars Racing
Expand that with the GCN and you get even more!
- Shadow the Hedgehog
- Sonic Adventure DX
- Sonic Adventure 2 Battle
- Sonic Gems Collection
- Sonic Heroes
- Sonic Mega Collection
- Sonic Riders
There is a homebrew port of Genesis Plus, but since there's already the Sonic Mega/Gems Collections it makes it kind of unnecessary if all you want are the Sonic titles.