I Need Leafeon And Glaceon To Complete My Pokedex I Platinum Where Can I Find Them?

You need 2 eevees.
Level an eevee up in the eterna forest and level one up on route 217
works easiest if u have a rare candy for each or give them an exp share and kill wild pokemon till they level up

Glaceon and Leafeon are evolved forms of Eevee. They cannot be found in the wild. Instead you can get an Eevee from Bebe in Hearthome City. Her house is next to the Pokemon center. Store Eevee in your PC box. After Beating the Elite four you can find Ditto and Eevee in Trophy Garden (South of Hearthome) Save the game before talking to Mr. Backlot. Talk to him ..... Turn off the game and restart until he says he has seen either an Eevee or Ditto in the garden. Go to the garden in the back of the house and search for a while. (You will not see them right away but don't give up) If you get an eevee at trophy garden.
Fly to Snowpoint city. There is an Ice Rock on route 217. Make sure Eevee is first in your party and run around the ice rock and fight pokemon until Eevee gains one level. You can also give it a rare candy at the rock and it will evove into Glaceon.
Fly to Floroma Town. Take the other Eevee out of your PC Box walk into Eterna forest. There is a moss rock in the top corner when you get inside. Do the same thing you did with glaceon, But this time Eevee will evolve into Leafeon
If you get a ditto in trophy garden Breed it with eevee at the daycare in Solaceon Town. Run around for about 1000-3000 steps- fly back and you will get an egg from the old man. Take eevee from daycare. (Ditto you can leave in) Run around with the egg in your party (It hatches in between 6000 and 6500 steps) Then do as listed above.
Hope I helped!

To see leafeon go to the route under the pokemon mansion
glaceon is on the route under snowpoint city