You just highlight them and read what they say, they tell you how to earn the medals. Some are a little vague, others are more direct.
For example, one simply reads "Star in every available movie at the Pokestar Studios", once you've done that, the medal man who appears at the Pokecentres will give you that medal, replacing the hint medal.
Go to Lavaridge City, use Rock Smash and the cable cars. Hint, hint
You can't get it in Pokemon Black. Use PokeTransfer or Dream World.
Deep within mount mortar. hint: you have to use the middle entrance
totally
No.
Use the portals (Hint: The bottom right portion of the gym has the exit portal).
Unfortunately, you have to use poketreansfer or cheat. You can't find it in Pokemon black.
Use a Nintendo DS emulator & download a pokemon black rom
use Pokemon GTS
Eelektrik does
It has to be a pokemon outbreak or use an action replay.
the pokemon you could use to defeat her is electric types or rock and ice