King's Knight © 1989 Square Company, Limited.
North American release. Game developed in Japan. For more information about the game itself, please see the original Japanese release entry; "King's Knight [Model SQF-KG]
Description from the back cover:
Four brave warriors have set out into the Kingdom of Izander to rescue Princess Claire from the grip of a fiendish Dragon. Through five thrilling, fast-action stages, our gallant heroes, a Knight, a Wizard, a Monster, and a Thief, will take on incredible enemies. Join in and help this tough team reach their goal!