World Heroes 2 © 1994 Cony Soft.
Pirate game featuring unusual characters.
There's a dip switch that switches between US and Asian versions of the game. However, the only difference between them is the World Heroes 2 logo.
Some of the graphics for Mario's stage are ripped from Super Mario Bros 3.
Much of the in-game music seems to be sampled from other games:
Ryu: E. Honda's level theme from Street Fighter II.
Mario: Title screen theme from Super Mario World.
Chun-Li: Her level theme from Street Fighter II.
Sonic: Title screen theme from Sonic the Hedgehog.
Leonardo: TMNT: Turtles in Time Opening theme (Looped).
Haggar: An off-tune version of the Metro City Slums stage in Final Fight.
Bowser: Blanka's level theme from Street Fighter II.
Laurence: Chemical Plant Zone from Sonic the Hedgehog 2.
Andy: His level theme from the Fatal Fury games.
Goku: Summary music from Dragon Ball Z: Super Butouden.
Mai: Her level theme from the Fatal Fury games.
M. Bison: Guile's level theme from Street Fighter II.