HELP!!!!!!

To get to Giratina you have to beat the Elite 4. After that fly to veilstone and go out the south entrance. There should be a new path on the right side of the screen called spring path. You will need a Pokemon with Rock Climb and Rock smash.
Climb up the wall and walk around the broken bridge until you enter the cave. I don't know which order you need to go through the doors, but keep entering the pathways until you get to it. It is level 70. (I caught it with a poke ball)

Close Combat
Infernape- lvl 41
Gallade- Lvl 53
Hariyama- lvl 52
Hitmonchan- Lvl 56
Hitmonlee- Lvl 53
Hitmontop- Lvl 51
Lucario- Lvl 42
Machop- Egg move
Makuhita- Lvl 40
Mankey- Lvl 49 or Egg move
Monferno- Lvl 36
Primeape- Lvl 59
Snubbul- Egg move
Staraptor- 34
Teddiursa- Egg move

Aura Sphere
Lucario- Lvl 37
Togekiss- I think you have to go see the move tutor in order for togekiss to learn this move.

After you beat the E4, garatina's on the route with the ruin maniac. Along the right, they'll be a path.

Staraptor learns Close Combat at lvl 34. There's no such thing as aura spear, but lucario learns Aura sphere at lvl 37.

Use spring path along route 214 after the elite four and you will come to a chamber which leads to Giratina Level 70 if you can solve it within 30 doors.
Aura Sphere can be taught to Lucario at level 37 and Dialga/Palkia/Giratina at level 90.
Close combat can be taught to Mopnferno at level 37, Infernape at level 41 & Staraptor at level 34,