Competitively Speaking:
Ash-Greninja(With Form): Expert Belt: Water Shuriken, Dark Pulse, Extrasensory, Ice Beam. With Ash Greninja's BST it would be crucial to get in some fast hits as well as having great priority Sash/Sturdy breaks with Water Shuriken.
Mega-Gengar: Gengarite: Perish Song, Shadow Ball, Sludge Wave, Nasty Plot: Taking a page from Wolffe Glick, Perish Trapping could be an effective strategy but as a last resort so sticking with Nasty Plot and STAB would be the main strat.
Cap Pikachu: Lightning Rod: Pikashunium Z: Volt Switch, Surf, Quick Attack, Thunderbolt: 10,000,000 Volt Thunderbolt is Arguably one of if not the best Z Move Possible against non immune opponents, as well as pivot, priority, and water coverage, not to be a stan but in reality, the Z Move Itself has almost 200 BP with a Crit Chance.
Gigantamax Charizard: Life Orb: Solar Power: Blast Burn, Hurricane, Solar Beam, Scorching Sand. In the SS Era. The Kanto Starters with G Max were metagame staples as the forms included Powerful Trapping GMAX moves that break through tough walls and preventing escapes cutting their HP by 1/6th per turn.
Serperior: Leftovers: Contrary: Leaf Storm, Dragon Pulse, Substitute, Leech Seed: This is the first instance where I evolve one of his unevolved pokemon. Serperior completes the Fire Water Grass Core the team needs as well as providing small recovery and serve as a heavy hitter when it builds up Special Attack with Contrary Leaf Storms.
Solgaleo (Nebby): Weakness Policy: Sunsteal Strike, Knock Off, Psychic Fangs, Morning Sun: When hit by a super effective blow that's faster than itself, Solgaleo can recover and start sweeping, a true powerhouse.
