Mega Dragonite

Mega Dragonite in Rain has an extremely positive matchup into Mega Charizard, one of the format's most common threats, which is exactly why Ninetales-Alola carries Rain Dance instead of just relying on its own Snow. Multiscale lets it absorb one big hit at full HP, and Extreme Speed gives it priority regardless of weather to finish weakened targets. Modest with max Special Attack makes Dragon Pulse and Heat Wave hit hard, while Tailwind provides a second source of speed control alongside Ninetales-Alola.