Super Smash Flash 2
Super Smash Flash 2 is very well known fighting online game which involves popular characters from different anime shows, arcade games and cartoons. This game currently is played by millions of gamers every single day. Game was developed by McLeodGaming.
SSF2 is so popular because each character in this game has its own unique attack and combo abilities. Game also has new health system which shows your amount of taken damage in percentages, once you reach 100% you will be kicked off from the arena and enemy will win.
It is also important to note that this flash game receives updates very often and sometimes McLeodGaming adds even new characters or arenas, make sure that you check game often in order to not miss major patch updates.
Oh and about those popular characters which you can see in SSF2, I will list some of them here: Black Mage, Bomberman, Captain Falcon, Donkey Kong, Ichigo Kurosaki, Kirby, Luigi, Pikachu, etc. impressive isn’t it?