For DS - The Legend of Zelda Ocarina of Time Walkthrough Part 11 - Getting the Ocarina of Time & Adult Goodies

Welcome  baaaaaaaaaaack!!!! Now that you're done with the three minor dungeons - the big face tree, the cave thing, and the fish stomach - you can get the Ocarina of Time and, well, yeah. But before we do - okay, I really don't want to beat around the bush anymore, and I want to go ahead in time already, so if you wanna know what that optional thing is, go here: https://www.zeldadungeon.net/ocarina-of-time-walkthrough/timely-appearance/#c6_2
Okey doke, that's the website I recommend (and download pictures from, and check to remember how to play, and look at whenever I'm stuck in any Zelda game), so let's get started by walking towards Hyrule castle - which gets all dark and stormy when you approach it - and watch the cutscene:
Zelda rides out on a horse. And there's Impa. And oh! There's Ganondorf. He follows them, then stops, stares literally straight at them and watches them go, then says to you, "Where did they go?"

Stupid, foolish green-man-thing. Link tries to fight (he's just askin' a question, dude, chill) but Ganondorf does so first. Can I hire you for my Fourth of July party, Ganondorf? I think those fireworks that come out of your fingers and knock Link to the ground would be a good addition to  my show. Yeah, that happens.
And Zelda threw something at you. So once Ganondorf is gone (galloping in the complete opposite of the direction they went, I'm guessing), head to the moat and jump in. Dive (the current is fast, so be careful where you dive) and grab the lil' thing.
The Ocarina of Time! Whoa. No, the one Saria gave you was the Fairy Ocarina. Anyway, find your way out and walk away, where the sky will change back to normal. Make sure it's daytime, then go into the castle.

Instead of going to the actual castle, head to the place you may have visited before: the Temple of Time. It's in the corner by the Happy Mask Shop. Once in that clearing (and I know the camera angle right here is unbearable, but, um, bear with me, I guess ... With the newly acquired Mask of Truth, you can talk to the Gossip Stones, but they, well, gossip, and it makes absolutely no sense.

In the earlier cutscene, Zelda interrupted with a prophetic vision to teach you the Song of Time. Play it in here once you have approached the pedestal, causing the three Spiritual Stones to spread out and the Door of Time (Gate of  Time? I forgot) open.

Head in, and grab the Master Sword. Then flash! Blue light, hahahahahaha, Ganondorf got in, aaaaaand you wake up seven years later.

Had a nice sleep, Link? And how do your clothes still fit ya? And where'd ya get that earring?!

Now Rauru appears. Hi, Rauru. Rauru (that's fun to type) says Ganondorf came and took the Triforce, because when the three goddesses created the world they left the Triforce behind them and the Temple of Time was built around it. He turned the world evil and full of monsters, so now you must awaken the six sages:

SPOILER AHEAD! AVERT YOUR EYES AND SCROLL DOWN IF YOU DO NOT WANT TO KNOW WHO THE SAGES ARE!!!!

Saria, the forest sage; Darunia, the fire sage; Ruto, the water sage; Rauru, the light sage (he gives you his medallion shortly), Nabooru, the spirit sage, and Impa, the shadow sage. Zelda is actually the unconfirmed 'seventh sage'...

Rauru does give you the light medallion, and then he sends you back to the Temple of Time, where Link tries to walk away, but he is stopped by Sheik. Sheik is a lady whose face is completely covered but for one eye (who is she?!? Maybe we'll ... see her face later ... ). Sheik tells you to go to Kakariko village.

SHEIK...

Leave the Temple of Time, and don't be surprised once you get to Castle Town and see ReDeads all over. Play the Sun's Song to stun them ... then get the heck out of there!!!! Head to Kakariko Village (which luckily hasn't been affected by Ganondorf .... much. Death Mountain is about to blow over, consume the village in lava, and kill everything - no, not affected that much) and go to the graveyard, through the northeast passage in town. Here, next to the soil on the left side, there's a grave with flowers in front of it. Pull it back and fall down.........

Dampe! If you came to the graveyard at a certain time at night as a child, you may have seen this freakish ogre-like man stalkin' around. Uh, I mean walkin' around.  Now he's a ghost, and he challenges you to a race of  sorts. Pretty much just follow him through the maze thingy......

"I may not look like it, but I'm confident in my speed! Let's have a race! Follow me if you dare!"

1. Follow the left side for the first part.
2. When you get to the big room, go through the doors in this order: right, left, right.
3. Stay on the right, and when you get to the room with ledges on each side, go up either one of the ledges. 

4. Continue straight ahead to the end.

Dampe congratulates you and leaves. A chest appears, and you'll find the Hookshot inside when you open it.

"As a reward, I'm going to give you my treasure. It's called the Hookshot!"

 This is a mandatory item to have. Now head to the doorway and go through the door, which closes and makes you trapped with a giant block in front of you.
Navi points out that the block reminds her of the Temple of Time, so play the Song of Time to remove the block.

Climb up the ledge you're faced with and go up the stairs, which will lead you to the windmill room you may have visited as a child. Jump off of the wood planks and talk to the music box man, Guru-Guru, to get the Song of Storms.

Now head to Lon Lon ranch for one more goodie.... Epona! Ingo now owns the ranch - he used to be a measly stable worker - and he is evil. Okay, so he is in the horse corral, and when you talk to him (well, it's a one-sided conversation) about how awesome he is, he challenges you to a race. Agree and give him the ten Rupees he wants.
Play Epona's Song to make Epona come to you, then hop on her to race. Hop over the two fences (press 'a' right before you get close), then z-target Ingo to accept the real challenge.

You must be strategic as you race. As you might notice, Ingo starts early, but he doesn't hug the corners which gives you a chance to ride ahead. Press'a' to speed up with carrots. Don't use all your carrots at one time. It might take more than one try to beat him......
 

Hug the corners

.... But once you do, he wants another race (50 Rupees). Okay doke. This time he  says you can keep Epona if you  win, so of course he tries to make you not win, uh, lose...
He is crazier this time. He cuts corners. He swerves in front of you once you get ahead! It's tricky! I really have nothing to say, but..... keep trying! Use your carrots and eventually you'll win...

Winning! yay! But... what's Ingo doing? 

... But Ingo puts a fence up so you can't escape, even with Epona....

.... but you can use Epona to jump over it.

Yay! Now..... we're out of there, so.... It's time for the  FOREST TEMPLE... See ya next time when I conquer the Forest Temple....