Phantom Ganon is the boss of Forest Temple in the Ocarina of Time Remake. Phantom Ganon uses the paintings around the room in order to deceive you before unleashing powerful fireballs. The battle is challenging, as you will need to determine the painting he will emerge from and retaliate with your sword.
How To Defeat Phantom Ganon

“Phantom Ganon” is one of the most fascinating boss battles in Ocarina of Time. The battle starts with him leaping between paintings after transforming into a mystical tennis game where the player must hit his fireballs back at him. Though this boss may look difficult on the surface, there are some very easy tips that can make the fight much simpler.
There are two stages in this battle, and the player needs both bow and sword during both stages. In stage one, Phantom Ganon will leap into one of the paintings found in the arena. The player has to discover the painting he has leapt into and strike him using an arrow.
It is necessary to keep your bow at the ready and pan your camera to see all the paintings. Eventually, you’ll see the Phantom Ganon approaching one of the paintings. At that point, use the arrow to shoot him back as soon as he leaves the painting.
However, the fight becomes more difficult with time. After the first arrow hits him, the Phantom Ganon will appear in several paintings, and it will be hard to determine which one is really him. Don’t rush your shots. Look for the point when Phantom starts to leave the painting, and then find the painting where he actually begins to leave. That is the painting to shoot at.
Second Phase

By the time of the last hit, he will be present in all the paintings; therefore, continue with the camera movement and look out. When you see the real Phantom Ganon making an attack, release your arrow. It’s not necessary to use arrows on all the paintings; just wait for him to come out and shoot the arrow. The battle continues to its second stage after getting the required hits.
The second stage of this battle involves the launching of fireballs by Phantom Ganon; thus, it becomes a kind of magic tennis game between you two. You must return the fireballs that he throws using your sword, and then gradually they will get faster and eventually hit him.
He will fall to the ground, giving you an opportunity to run towards him and slash him with your sword. Strike him as much as possible while he is on the floor because that is the only chance that you get to attack him. He will then begin to fly back into the air and attack you by using a lunging attack to reduce the distance between the two of you. Watch out for him, and roll away when he rushes at you. It is also possible to shoot him with an arrow when he is lunging.
He will once again go back to attacking you with fireballs. Have your sword prepared and continue to block and counter the fireballs until you finally hit one. Once you do, go back to slashing him as much as possible. Continue doing so until you defeat him, avoiding his lunging attacks all along. When you have successfully beaten him, stay back and watch out for any other cutscenes in the remake. There is new exposition available.
