In my time on the Internet, I've seen a lot of crazy video game controllers that tread the line between practicality and awesomeness. However, I think I can honestly say I've seen one that takes the crown of most well-intentioned, but questionable practical game controller ever made:
No, this is not bootleg, but an official controller licensed by Capcom back in the day. Apparently it was designed to be lower-priced alternative to full arcade stick during the hight of Street Fighter II's popularity. While its bizarre asymmetry might look rather intimidating to some, it's actually relatively easy to use.
Basically, you would hold the left side of the controller as normal to use the d-pad. The pistol grip at the bottom is used to stabilized the controller so you tap the face buttons with you fingers like you would at an arcade machine.
You can find the controller used on Ebay and other places, but it was brought to my attention specifically because
NCSX is actually have a sale on them. So if you like obscure game controllers, then you should probably check them out before the sale ends.
Tiny Cartridge, via
NCSX