Can someone please tell me where to get some good monsters in the wild im strugling with the champion league and I’ve only got epics out of gold eggs
Seems like u can only get them from eggs 
Move through each island until you get a notification in the upper right of your screen telling you there is a rare monster in the area. Keep battling in that area until you catch it. Also make sure to go through the dungeons and catch the 3* at the end.