Here are some intros from Sonic the Hedgehog shows. Currently I have all the ones in english but I'll be adding ones for other languages. If you have a request go ahead and post it.

Adventures of Sonic the Hedgehog Opening-E
Sonic SatAM Opening-The Fastest Thing Alive-E
Sonic Underground Opening-E
Sonic X Opening-E
Sonic X Opening Japanese version-E

Feel free to talk about your favorite intros and which ones are your favorite shows and why.