WW Gohma- Fire/Bug- X-Scissor/Flare Blitz- Magma Armor Kalle Demos- Grass/Dark- Power Whip/Foul Play- Levitate(well, if it's hanging on the ceiling..) Gohdan- Steel/Fighting- Bullet Punch/Hammer Arm- Justified Phantom Ganon- Ghost/Fighting- Hex/Sacred Sword- Cursed Body Helmaroc King- Dark/Flying- Foul Play/Pluck- Pickup Jalhalla- Ghost/Fire- Flame Burst/Double Team/ Shadow Ball- Cursed Body Molgera- Ground/Dragon Sand Tomb/ Dragon Tail- Levitate
I'd put Flamethrower on Gohma given its fire breath, Searing Shot on Gohdan given its attack when you disable the hands, Energy Ball on Phantom Ganon because duh, and Swallow on Molgera because of what happens when you get too close.
Also, the person who did the TP bosses - Morpheel for Water/Rock, not Water/Dark. Look at its body.
Majora's Incarnation is what happens when game designers smoke crack.