I would make an Enemy called Chair that looks like a table because snakes are called Rope. It would take two hits to kill and does 1 heart of damage. It comes lunging in at you and is very weak to fire arrows.

A boss for a forest dungeon called Dreursa: The Great Bear of Terror. It is a giant black bear with patches of its fur missing, revealing rotten flesh, and it has glowing yellow eyes. Its claws are exceptionally long; It is also riddled with scars and arrows. Dreursa's attacks consist of slashing link with its claws, creating shock-waves, and breathing poison. Link must defeat it by hiding from the bear, while avoiding its attacks, until it starts sniff him out. Making use of the Leaf Cloak to stay hidden, Link must carefully climb the bear and stab its revealed flesh; link immediately ejects after the deed is done and the Cloak's effect is gone afterwards as well. After all fresh patches have been stabbed phase two will begin where it no longer possesses its poison breath, instead it goes on a full on rampage. During this time Link must make roll out of the bear's way to trick it into ramming itself into wall, stunning it and leaving it open to attack. However, it will take more time to trick it each time it recovers. 

I would create Bovir, a small swine that's very tough and tries to ram into you the whole time. I don't have a real idea for bosses at the moment.

Malron, it wields a stick and if it hits you with it from behind, it trades your sword with the stick, and you can't get it back until you either kill it (it'll have a lot of health) or use a bomb on it, which renders it defenseless.

For a boss, how about Jigen. He would be a giant, wielding two swords and complete coloured in black and white. He would go between the light world and dark world during the battle, and attack link from an other dimension. Link must go between the dimensions in pursuit of Jigen to attack him. 

I'm not that Creative but a boss Named Kyrothem It looks Like an octorok But when you attack it turns into a half Dragon half lion like creature and it attacks slow but its 1 hit KO And it shoots out Beams of dark material and you attack it by hitting its tail

Th3 De4th Eag1e : I would make a boss for a windy temple. Called 'Spi Legs' A huge spider with large legs. His battle style is very similar to Odolwa from MM

I would make a female character to be the main villain. I just noticed that the main villains are always males or some sort of creature that resembles a male. I could be wrong.

Anyways, this female villain would be named Solaris. She would be by your side as your " fairy " but at the same time she is the one that is doing all of the bad deeds. She's was sent by Ganondorf to destroy Link and if she refused her Kingdom would be destroyed by him. Ganondorf needs time for his evil scheme's and he already has the triforce of power ( I don't know what that scheme is ).

Solaris would have pale white skin, silver long hair with red eyes. She would also look like a kokiri, short, her appearance doesn't change, pointy ears, a dress ( not sure what the color would be but the design on it would look complex a little ) and a light green koriki hat. Last but not least she has a innocent face which changes little by little when she does evil deeds.

She floats, has very strong magic and could summon any type of monster from her world. So the bosses that Link would face in each dungeon would come from there. Solaris would also help link cause she is not evil at heart she just has to play the part but does it behind his back. However, as she continues to do evil deeds she starts to become little by little and eventually you have to fight your comrade before the big finale ( like how you have to fight Zant before Ganondorf in Twilight Princess).

My mind is very creative but this might be a little corny haha

I would create a mini-boss known as a Flaregheist. Obviously by the name, it would be a ghost formed by nothing by flames. The only thing that can hit it is by using ice arrows and it would take 15 shots. It would dead half a heart of damage if touched or 1 heart of damage if hit by one of its attacks; It will dash at you or it will unleash three fireballs that will follow you for eight seconds. A secret way of defeating this boss would be to play the Song of Storms. Once it dies, it will unleash an explosion that will do 5 hearts of damage if you're too close.

Now this one needs back story. When I played the water temple I thought that the boss was a shark at first but it was morpha
 so my idea would be some sort of shark maybe anthropomorphic it would probably use a hydro pump like attack and try to bite u