How do you get smeargle please tell me I have looked everywhere and I still..

Smeargle- In Ruins of Alph near the trainer with Girafarig

Yanma- In the grass under National Park. They're rare though.

Smeargle can be found in a secret patch of grass around the Ruins of Alph accessed via Union Cave, and Yanma can be found on the Route just north of Goldenrod City, in the grass just to the right of the entrace of the doorway to the Bug-Catching Contest building.

Go through the cave at the bottom of the map after you have been through blackthorn city go through there then you need to go in the only ladder in there. Go across the water and then go left. Use strength on the boulder and then go into the grass during the day you should find smeargle.
As for yanma go to the grass before the national park at night and should find it there but not sure.
Hope this helps