So I'm guessing this would replace our current setup? Or are you saying one from each Gen in addition to the ones we already have?
That'd be a LOT of pokemon lol. I'm just going to write mine as if they were the ONLY pokemon present
Gen 1: Mewtwo- Just make him Heavier and I'm happy
Gen 2: Ampharos- Down B Thunder, Neutral B Thunder Punch, Side B Body Slam (chance of Stun), Up B Cotton Guard (creates a Cloud Platform that instantly bounces him upward before quickly disappearing)
Gen 3: Gardevoir- Down B Reflect (only Projectiles), Neutral B Psychic (works like Zelda's Side B), Side B Dazzling Gleam (looks like Metwo's Down B; low damage, high Shield damage), Up B Teleport
Gen 4: Garchomp- Down B Stomping Tantrum (Causes Trip on either side of him; fastfall slam to ground if used in air), Neutral B Dragon Claw (Powerful slash in front of him; can be used in quick succession for multiple Slashes like Fire Emblem characters' Sword Dance), Side B Flamethrower, Up B Dragon Rush (can control direction to a certain degree)
Gen 5: Gothietelle- Gardevoir Semi-Echo but with Dark Pulse instead of Dazzling Gleam (short range dark energy pulse wave on either side of her) and Cosmic Power instead of Teleport (Teleports like Zelda instead of like Metwo or Palutena)
Gen 6: Pangoro- Down B Counter, Neutral B Brick Break (Falcon Punch but with Dark aura instead of Fire), Side B Vital Throw (command Grab like Bowser side B), Up B Sky Uppercut (like Mii Brawler's but better vertical recovery)
Gen 7: Ultra Beasts- (Works like Pokemon Trainer in that there's 3 of them, but there's no actual trainer in Background) Down B switches out Pokemon through a quick Ultra Wormhole effect to a Different UB (Nihilego, Buzzwole, Phermosa) [Moves & effects are for pokemon in that order]
Neutral B- Acid (burns), Fell Stinger (stuns), Silver Wind (Pushes Back)
Side B- Headsmash (High Power & Knockback, Startup Lag), Hammer Arm (High Power & Spike, End Lag), Bug Buzz (High Power both sides, Sing Range)
Up B- Psywave (High vertical, Short Horizontal recovery), Lunge (Low Vertical, Long Horizontal recovery), High Jump Kick (Like Incineroar's, but can cancel out to free fall anytime)
Gen 8: Toxtricity- Down B- Eerie Impulse (stun on both sides), Neutral B- Poison Jab (low damage, Flower effect), Side B- Overdrive (slams guitar exuding electricity overhead and down; wide arc, high damage, Spike effect on Sweetspot), Up B- Boomburst (sound explosion directly beneath propels character high up and spikes anyone directly beneath; low horizontal recovery)