Help pokemon diamond?

Question

i need help with the part where your friends grandpa tells you your friend and dawn something to do and it happens after you get your 6th gym badge. your friend comes out and brings you into the canalave libray and thats when the grandpa tells you what to do it has something to do with lakes and team galatic.

Answer 1

Dont listen to Psyopus.  you have to go to lake Valor. Just go past the hotel by where cynthia gave you the secret potion. Then you will have to keep going up. The 2 guys who were standing there before are now gone. So now you can go in! And the rest is simple just battle everyone!

Answer 2

look in the lake

Answer 3

go to the lake and press a

Answer 4

-You have to talk to the Galactic guy in Pastoria City, he is near the marsh's Observatory.

-He will try to run away but you have to keep following him.

\\\\\\\\\\!!!!!!!!!DONT LISTEN TO ME!!!!!!!/////////