Solid Snake

Solid Snake (ソリッド・スネーク, Soriddo Sunēku) is the main character of the metal Gear series created by Hideo Kojima. He is a combination spy, special operations agent and mercenary of FOXHOUND, a fictional black operations and espionage unit. He is repeatedly tasked with disarming and destroying the latest incarnation of Metal Gear, a bipedal nuclear weapon-armed mech. He also makes an appearance in Nintendo's Super Smash Bros. Brawl as one of the two third party characters in the game, along with Sega's Sonic the Hedgehog. Because of this he may become a playable character in Super Smash Flash 2.

Super Smash Flash 2
Snake was previously confirmed to be a newcomer character due to his appearance in Super Smash Bros. Brawl, being shown a trailer for SSF2. His current confirmation status is unknown but due to the Shadow Moses Island stage becoming available in Super Smash Flash 2 demo 0.7 it's likely he will appear. If so, his moveset could be similar to his SSBB counterpart.