This is a cycle build that keeps Mega Venusaur and Sylveon alive as long as possible to stack repeated value, with the Garchomp–Sylveon–Venusaur trio as the core axis. This season, to match an environment with more new Megas from the Metagross and Charizard lines, Delphox was adopted instead of Mega Charizard X, and a Substitute+Curse Bisharp was added to check the Gengar+Umbreon combo.
The default selection is the Garchomp+Sylveon+Venusaur cycle, swapping in Delphox instead depending on the opponent's Mega composition. Bisharp and Greninja are pinpoint picks aimed at combinations like Hippowdon+Metagross+Primarina, and bringing them in trades off either Garchomp or Sylveon; securing as many actions as possible for Sylveon is what decides wins and losses.