I had this idea years ago about another MM boss

Name: Happy Mask Man, Demon of a Thousand Faces

Majora some how possesses tha happy mask man and attacks link in desperation after you beat it in the origial MM ending.

Powers: At first youll be fighting a Ganondorf-ish type battle in wich he levetates and you hit him with arrows and such. Then a mask will come out of his bag and he transforms.

1st Stage: He transforms into an Iron Knuckle type enemy thats slow but powerful. He is invornuable except that after a while of fighting a symbol picturing majoras mask appears some where on its body and you have to strike it with what ever weapon you want.

2nd stage: After beating that hell transform back and get a diff. mask. its a plain black mask, and after putting it on he sinks into the ground. At first you think hes not there.. but look at links shadow! It has changed into the image of The happy mask man. Hell pop out occasionaly and attack, forcing you to play extreme whak-a-mole with him.

3rd stage: hell just stay with majoras mask now. He grabs a sword and lunges out at you. There is no strategy in fight, only skill will win it (AI).

and thats it ^-^ ill draw a possessed mask man laters and put it up!