Hisuian Typhlosion / Charizard-Y Sun

Synergy

Mega Charizard Y sets permanent sun and fires off Solar Power-boosted Heat Waves, while Choice Scarf Hisuian Typhlosion becomes the primary sweeper: Eruption at full HP under sun is devastating, and Frisk scouts opponent items on entry. Whimsicott provides Prankster Tailwind and Sunny Day as a weather backup, Venusaur doubles down on sun with Chlorophyll and Sleep Powder disruption, Hisuian Arcanine offers Intimidate chip reduction and physical coverage, and Sneasler adds a fast White Herb Unburden attacker that can threaten wide offensive pressure.

Win Conditions

Get Sunny Day active via Mega Charizard Y or Whimsicott, then unleash Choice Scarf Hisuian Typhlosion's Eruption to clean through weakened teams. Tailwind from Whimsicott compounds the speed advantage, and Venusaur's Sleep Powder shuts down threats that resist fire.

Lead Options

Typhlosion-Hisui + Whimsicott, Charizard-Y + Venusaur, Charizard-Y + Whimsicott

Threats

Pokémon that resist Fire and Ghost (Steel-types, certain Rock-types). Rain teams that override sun. Priority users that chip Typhlosion's HP and reduce Eruption's power.