Gen3 competitive team guide

I need a help about a team for Gen3

I am planning a Slaking, scizor, swampert, aggron/tyranitar, zapdos/raikou

Suggest me the full team please
And I cant take any legendries (except zapdos/raikou)

Your team sounds about ok-ish.
Your team is a bit too weak to Earthquake so I'd suggest choosing Zapdos over Raikou.
I'd also suggest for you to take Tyranitar over Aggron.

Aggron pretty much is bad, too many weaknesses and inferior to Tyranitar in every sense of the word stats, movepool, ability etc you name it.

Slaking is a momentum sieve due to its awful ability. However if you must use it, it basically 100% needs Magneton support to remove Skarm, Forry etc which is of concern or your team folds to Spikes even before the battle has begun and Slaking offers them a free switch in as does Swampert and Scizor.