Some Post-Game B&W2 Questions?

Question

•Where is Colress for the 2nd Master Ball?
•Where is N for the “weather team” battle?
•Where is Alder?
•How do you go down the Tree Hollow (I have White 2)?
•Where is the Nature Sanctuary?
•What are NPCs?

I was looking at another question, and I realized I have plenty left to do. I know it's a lot, but I would appreciate an answer =)

Thanks!

Answer 1

• Colress is found near the P2 laboratory in Route 17 and 18. You must Surf your way around the watery route and then get on the Plasma Frigate. Go to the same room Colress was in before you battle Kyurem. He will be there and ready to battle.
• On Friday, N can be found at the Ferris Wheel in Nimbasa City. After talking to him, he will head back to his castle. Then, he can be battled once a month.
• Alder is in Flocessy Town, in a house all the way north of the Pokemon Center.
• You get into White Treehollow after gaining access to White Forest and defeating Alder in Flocessy Town.
• The Nature Preserve is found after seeing all the Pokemon in the new Unova Pokedex (besides Keldeo, Genesect, Meleotta, and Victini). After doing so, talk to Professor Juniper in Nuvema Town. She will give you a License. Then, head to Mistralton City's Cargo Center, where a plane can take you to the Nature Sanctuary.
• NPC are non playable characters. They are basically the characters in the game that can't be role played.