1. Freaking Chris Thorn-dick
2. English Dub provided by 4Kids TV
Now that I got that out of the way, even though I don't like the show much, I do think it's theme is awesome. There are three different versions. Japanese, European and North American. Here are my top three:
#3. European
Although this version is somewhat catchy, it is very bland. It's just people repeatedly saying (singing) "Sonic X."
I won't even bother putting a link of this version on this post because it's so boring. If you want to see it, look it up on YouTube. It's everywhere on there.
#2. Japanese
This song is good, but it's not good enough to be my favorite. Why? Simply because it is in Japanese.

#1. North American
This song, without a doubt, is my favorite version. What else can I say but..., "GOTTA GO FAST!"
So those were my favorites, what are yours? Remember! GOTTA GO FAST!