6th slot to my team.

I need help choosing my final Pokemon on my team. I'm still learning competitive battling, so this is kind of difficult.

So far I have Mega Aggron, Slowbro, Thundrus-T, Garchomp, and Clefable.

I do not know the movesets I want to use yet because of this last slot.

Idk if this is a good team or not, but it seems as though I have at least one resistance for everything.

Any help?

~Josh

Your individual Pokemon choices seem alright, though personally I'd use Thundurus-I instead of Thundurus-T.

Something you could consider putting in your last slot is Infernape. Your team currently lacks Fire and Fighting, 2 very useful offensive types. A mixed set would be good, to help you break walls and stuff:

-Infernape w/Life Orb or Expert Belt
Nature: Hasty/Naive
Ability: Iron Fist
EVs: 180 Attack, 76 Sp.Attack, 252 Speed
Moves: Close Combat, Fire Blast, Thunder Punch, Hidden Power Ice/Grass Knot