1
What is the Sinnoh Challenge?
If you collect them all, you will receive x3000 stardust, 15 ultra balls and a magnetic lure module. You will also get a badge and completing the challenge will count towards your Elite Collector Metal. The badge that you receive will have a number on it, showing what place you received before other trainers.
2
What are the new Pokemon?
You can also find the following Pokemon appearing in the world: Bidoof Drifloon Glameow, Purugly and Hippopotas.
3
How do I catch the Shadow Pokemon?
For Shadow Stunky, you will want to look for a Dark-type Team Rocket Grunt to battle against who is female and says “Where there is light, there is also a shadow”. That grunt will be the one that has the Stunky, but you might also get other Pokemon from her.
For Shadow Snover you will need to find an Ice-type Team Rocket Grunt, who will say “You’re gonna be frozen in your tracks.”
4
What about the other Pokemon?
Many of the others you will see in the world, but do continue hatching some eggs.