Here’s a much easier team for you to use:
Bold Mega Milotic: scald, ice move/rain dance, moonblast, recover
Delta Charizard: shadowball, sludge bomb/flamethrower, dragon pulse, shadow sneak
Delta Snorlax: belly drum, drain punch, seed bomb, and synthesis/earthquake
Delta Haxorus: ice fang, crunch, iron head, aqua tail
Delta Chandelure: moonblast, earth power, energy ball, heatwave
Armored Tyranitar: crunch, stone edge, earthquake, superpower