Strength.
you can get him in the past.unfortuneatly you have to have a friend who has the same to kinect or else you cant get past some blocks
blocks are exclusive from pokemon diamond,pearl and platinum,so you can't get it. But you can feed pokemon with beries.
Grass blocks in pokemon heart gold are were wild pokemon hide you may catch them and train them or you may beat them with your pokemon and earn exp.
You must get the National Dex because some Pokemon found on the Route he blocks are not in the Sinnoh Dex. You must beat the Elite Four before you get the National Dex.
Switch Pokemon after every 20 blocks.
You can't.
you push the outside blocks then the inside blocks then push them together
you can't...
48.
Green!
Which blocks? There's a serious problem with the questions I'm finding on this site.
It's practically just food for Pokemon that you can make using berries. You can mix the various berries in a Pokemon center.