Some possible members that I have looked into is drifloon and golem but I don't know at what levels you get them and where. (and also how to evolve golem)
*possible spoilers*
So I beat shade and then beat team mirage in the factory and now I am in apohyl beach.
My team is: (keep in mind everything is level 36)
Skuntank:
Acid Spray
Flamethrower
Toxic
Slash
Weezing:
Sludge Bomb
Assurance
Selfdestruct
Poison Gas
Blastoise:
Aqua Tail
Bite
Withdraw
Skull Bash
Hariyama:
Fake out
Smelling salt
Force Palm
Whirlwind
Houndoom:
Faint attack
Fire fang
Roar
(a useless move i cant remember of)
Ludicolo:
Bubblebeam
Mega Drain
Mist
Nature Power
So Weezing cannot hurt anything and so far can't take any hits. So I am looking into replacing him. The problem is with who. I need a pokemon that doesn't have the weaknesses of the others in my party and a pokemon that I don't need to train a lot. (so something that is in the same area that I am now and beyond that)