You can find wimpod in Kakori villafe safari zone, but you have to pufify the cave with pyukumuku in battle (entrance is in route 5, that route which leads to Valor mountain, you need rock climb). Basically, you go to route 5, find that corrupted cave and purify with pyukumuku. Then you exit the cave, return to village, enter safari zone and find cave entrance from safari zone.
Golisopod has been my ace ever since I got him. Really awesome addition to my team and brought me many wins... For Tyranitar I used chandeluer (because he changes to normal type and ghost is supereffective in inverse field). Mega aerodactyl gets one shot with 1st impression if I remember correctly