i suppose i have to admit defeat, after years of denial it must be true, i am a geek. when i see a t-shirt design like this and go "ooh, that'd be cool!" i need someone to just give me a good, hard slap.

if you can answer the following questions, sorry, you're a geek too.
a) what does this t-shirt refer to?
b) what character is portrayed in this t-shirt?
c) what two other feats can this character perform?
...and, for ten bonus points
d) what does shoryuken mean when translated into english?