I'll have to recheck my Pokemon's movesets. At the moment, Swampert can have Earthquake, which is kinda strong. I can just have him know Earthquake before changing it to Sand Tomb before the Whirl Cup. XD
When Sceptile isn't being bothered by exhaustion, there's Leaf Storm, Focus Blast, Leaf Blade if critting, Night Slash if critting, I can have it have Focus Energy and have it hold a Scope Lens to increase the chances to do so to 100%. As he'd still have Focus Energy trained since the Gardenia fight.
If this thing's at lower health, Wishiwashi has Brine? and Beat Up? Eh...
Swampert's got Liquidation. XD But it also has Counter and Mirror Coat. The problem is, will it survive a single hit? :'D Probably not.
Hatterene has Psychic, Psyshock, Light Screen, Dazzling Gleam, and Aromatherapy as possible moves to use. But uhhh.... Not sure how well those would do.
Aerodactyl has Stone Edge and Thunder Fang. And... I guess Fly.
Parasect isn't much of a battling mon, but she has Dry Skin (not sure how much she can absorb lmfao), but she also has Aromatherapy and Spore. If all else fails, we can use Spore. I uh.... kinda forgot about that, in all honesty.
Froslass has Hex. What she can do though is start Hail and have her use Aurora Veil, then have someone change it back to Sunny Day. She also has Confuse Ray and Will-O-Wisp just in case.
So uhhh... that's it XD