Ryu (Street Fighter)

One of the most well known characters in the Street Fighter Series. He serves as one of the mascot characters and has been around since Street Fighter (the first one). Just to clear this up Capcom is the copyright holder of the Street Fighter Series, from a M.U.G.E.N. author perspective there are at least fifty "close duplicates" however over 100 versions is not unreasonable.

Similar Characters
There are a few characters in the Street Fighter Series that have notable similarity to Ryu:
 * Ken Masters (He usually just goes by Ken)
 * Akuma (Known as Gouki in Japan)
 * Gouken

In M.U.G.E.N.
Ryu along with Ken and Akuma/Gouki are probably the three most commonly remade characters (As I will offer some proof to later). This is for several reasons including:
 * His sprites are fairly easy to find online
 * He is popular
 * There are several Capcom made versions with different move lists and fighting mechanics

Some Examples
This category should is divided based upon whether or not it appears they tried to stay close to character.

Remake

 * Ryu by xzero
 * Ryu by Atice
 * ryu by bc ( street fighter alpha 3 )

Borrowed Sprites
Mega Weapon