in the battleground in think
If your in the battle frontier and have access to the battleground (bucks Grandfathers house), Equip exp. share or lucky egg (or both!) and fight Pokemon level 70+, that should get you to level 100 in a matter of weeks, if not days.
You don't you talk to Bebe in Harthome City the house next to the Pokemon center
You go to the Survival Area and his house is on the left of the Pokemon center
he went to his grandfathers house in the suvival area.the house is the house next to the Pokemon center.then you can get heatran.
It would be at Gamestop if they announce that you have to go to Gamestop to get whatever. But the other times you can do it from your house if you DS is connected wireless.
there is a house near the Pokemon centre i think its in hearthome city. go in and the person will give you an eeve
he is in survival area in a house next to the Pokemon center
You would find swarming Pokemon on rt 228 at the grass patches up north or the south where the house is.
Buck's house is the one to the left of the poke center in the survival area.
talk to little boy in salaceon ruins. go to his house his mom gives u a seal case
Bucks house is next to the poke centre in the survival area (the north town) on the island accessed by going on the boat from snowpoint city after completing the elite four
There's one in Veilstone in the bottom left house and there's one in the Ribbon Syndicate in the Resort Area