An update after a long time.I have defeated all the remaining routes and areas like Dreamyard etc and got all the seven sages arrested but my team was still in its mid 60s while the GameFreak guy,Elite 4,Alder and Cynthia all have 70+ Pokemon,so i decided to train in the Nimbasa Domes.I defeated Cheren easily in the Victory Road Rematch and was just waiting to defeat Bianca but i came to know that you've defeat the Elite 4 for the second time to have rematches with her.Anyways, all of my Pokemon are now Lv 74-75 so i decided to battle GameFreak guy since I thought it would be easier to defeat him than the Elite 4,Alder or Cynthia.On the first attempt i could defeat only his Liepard and his second Pokemon,a damn good for nothing Simisear swept my whole team.On the second try,I got a little better and defeated his Liepard,Simisear,Swoobat and Zebstrika but my last Pokemon was defeated by his Simipour's Acrobatics.It seems like I'll have to train some more maybe to Lv 80 to defeat him.

My Team:

Tangling
Mushroom
Egg Mash
Cradley
Tropical
Eeks(In-game Trade)

Boxed:

Box 8(For Reserves)

Snaky
Leavy
Leafmon
Deerly
Fungy
Thorny
Cottony
Lillil
Cacti
Grassy
Cherry
Sunny

Box 7(For HM Slaves/Others)

HM Only Drilbur
HM Only Ducklett
'The Forced to catch to advance storyline' Reshiram
HM Only Buizel