In the realm of Super Smash Bros., the term "Smashers" can refer to one of two things: the player, or the characters in the game. On this site, it refers to the latter.
The characters will be divided into the following realms:
Super Mario Bros. .
Sonic the Hedgehog
The Legend of Zelda
Metal Gear Solid
Donkey Kong Country
This game would also hypothetically include downloadable explansion packs
Expansion pack # 1 Anime rumble
Expansion Pack # 2 Bionicle
Expansion Pack # 3 Final Fantasy
Expansion Pack # 4 Kirby Madness.