Badu

Baelfael, the Crimson Flame (Bomberman boss)

Bahamut (any FF)

Balrog

Banjo/Kazooie

Banon

Barinade

Barracks (Starcraft)

Battle Clash Robot

Bebop (TMNT)

Beezwax

Behemos, Lord of the Frozen Wastes (Bomberman boss)

Behemoth

Belcha

Berter

Bill the Cyborg Commando

Billy Lee (Double Dragon)

Blaze Leviathan

Bo (BOF 1)

B.O.B.

Bob the Nettling Imp

Bomberman

Bongo Bongo

Bore Alien

Bow (BOF 2)

Bowser

Boy (Secret of Mana)

Brian (Chrono Trigger created)

Brian (Earthbound created)

Bruno Templar

Butz