MAXIMUM PACK NUMBER: 10 Click the button in the top left corner to get another pack member. Click the trainers to get rid of them. They want to catch you and your pack! You earn 10 XP for clicking them and if you earn 100 XP you evolve. Every 50 XP after that, your pack members evolve. You need to have a fully evolved pack and go for 50 more XP afterward to win.
I added a few more Eeveelutions, but I got most of this from @eeveelution_trainer
