Okay, I changed it a bit. Do you think its better? I can still go for suggestions and advice.
Zapdos @ Leftovers
Modest
EVs: 252 HP, 148 Spd, 108 Sp. Atk
-Thunderbolt
-Hidden Power [Ice]
-Light Screen
-Substitute
Uh Gyarados counter and light screen to help Garchomp against sp attacks...