I am having trouble beating East(Helios City Gym Leader) and was thinking that maybe a Mega Delta Blastoise would help me out a little. I already have a Delta Blastoise and a Mega Ring and just need the Mega Stone. I accidentally had turned Purity Mode on so I only got the regular Blastoisinite, which doesn’t work with Delta Blastoise. Is there any other way to get it because I’m really getting stuck and don’t know what to do. Also, I have saved many times after getting it so I don’t think I can go back. Any tips for beating the Leader are also greatly appreciated.
If it helps, here’s my team(I know it sucks I’m going to get them all items):
Lvl 51 Rapidash - Flare Blitz, Bounce, Flame Charge, Fire Blast - No Item Yet
Lvl 49 Haxorus - Rock Smash, Dragon Claw, Cut, Swords Dance - Focus Band
Lvl 41 Delta Blastoise - Shadow Sneak, Cut, Dark Pulse, Aura Sphere - Focus Band
Lvl 43 Raichu - Charge Beam, Quick Attack, Electro Ball, Discharge - Cleanse Tag
Lvl 42 Feraligatr - Ice Fang, Rock Smash, Crunch, Chip Away - No Item Yet
Lvl 47 Azumarill - Aqua Tail, Play Rough, Aqua Ring, Superpower - No Item Yet
Thanks for any help you can give!