I'm sorry to tell you but unfortunately this is not from a game. It's actually from an animation done by Paul Robertson called Pirate Baby's Cabana Battle Street Fight 2006. You can see the whole thing here http://www.coolonpurpose.com/2010/05/pirate-babys-cabana-battle-street-fight.html and if you like the style, he also created Scott Pilgrim vs. The World: The Game on XBLA and PSN.
graphics look a bit like maplestory
OMG SAME HERE!!! Ive been looking for the name of it for like...3 years?
can someone tell me please where is that game from?