Trouble with Final Two Slots

[tygaa2]

I like your team so far KiddFrosty!
I would change Rotor-W EV's to

Rotom-Wash @ Sitrus Berry
Ability: Levitate
EVs: 252 HP / 116 Def / 4 SAtk / 132 SDef / 4 Spd
Calm Nature
– Thunderbolt
– Hydro Pump
– Will-O-Wisp
– Protect
Rotom only has a ~6% chance of being knocked out by Modest 252 SpAtk Charizard-Y’s Solar Beam.The 116 Defense lets it take two Adamant 252 Atk Azumarill Play Roughs without being knocked out when factoring in Sitrus. You have two dragons so you need multiple switch in VS fairies.

Like Eeveeli said your team is weak to Rock you can see here

I think Ludicolo would do everything you want. It learns Fakeout that can help Charizard Dragon Dance. It doesn't resist rock attacks but its water and grass attacks will hit rock super effective. This will also help you vs rain match ups. Ludicolo build below

@ Assault Vest
Ability: Swift Swim
EVs: 132 HP / 20 Def / 252 SpA / 4 SpD / 100 Spe
Modest Nature
– Fake Out
– Scald
– Ice Beam
– Giga Drain

Get a full team together by sunday and play the tournament!