[Stu]

Skate can lick my love pump.

Shiva's an unlockable in the decidedly weird SOR3 so I never really count him as a playable character even though he is. It's too unfair on the others. Shiva is all that.

You can unlock Ash in Bare Knuckle III [SOR3 in Japan. Which is even weirder than SOR3 is].

http://www.soronline.net/sor3_sor3vsbk3.htm

Here are some of the differences. It's a cool website with loads of info on the games including these really cool charts with all the generic enemies you fight on them. There's a bizarre myriad of Game Gear and Master System ports each with their own subtle intricacies that most people don't even know exist.

And if you haven't played Streets Of Rage remake yet, have a word. It's free to download out there on the interweb and is literally one of the best games ever.