These were a variety of bosses I planned on using on different levels of Asteroid Armageddon or a follow-up Fun-boy in Space game.
Some bosses are in the current game.

Eyeball Monster


Alien Zorkon


The Bearded Surfer  aka Mr. Skinner )


The Mechanical Maze – Here Fun-boy would have to dodge a bunch of contraptions trying to crush, zap or capture him.


Mickey Mojira


The Dark Lord  ( F.U.D.C.! )
For those that haven’t made it to the final level yet to see Mick Mojira…


Robot Monster


Kitty Boss


very first sketches for two of the boss monsters