https://pastebin.com/S47npaew
Hey!
Here's a Psy Terrain team:
Lele Extender
Mewnium Z Defog
Hawlucha Psy-Seed Bulk-Up SD Drain (Maybe Edge for coverage and HJK for more damage)
Volc Psychic
Protean Extrasensory Gren
Mega Ttar Rocks
Ttar is exchangeable, tho I like some weather control with Ttar.
Feel free to customize :) if you feel like trying the team in the first place :P