Here's an interesting discussion regarding Pokemon.
If Smash were to each get a Pokemon Trainer from every region. What would their three Pokemon be and why?
Well first, I think each trainer already had a design for the games, so the male & female sprites would be the basis for the designs for the Smash Trainer. I also don't think I'd incorporate a full 3 pokemon for each trainer. That said, here's what I would go with for the regions:
Kanto: Pokemon Trainer - I think it's good as is.
Johto: Pichu & Sneasel - Fold the Pichu character we already have into this character concept instead. Down B would be to Switch between Pokemon, so Pichu wouldn't have Thunder, but this would be the opportunity to distinguish him further from Pikachu anyway so it's no longer a Semi-Clone. As for 'Why' for the two of them, Gen 2 introduced 'Baby' Pokemon (Pichu, Cleffa, Igglybuff) and 2 more Types, Steel & Dark. Sneasel would be good at quick slash attacks and Ice moves.
Hoenn: Blazekin, Marshtomp, Sceptile - Gen 3's new mechanic was 'Abilities' so it's best to just stick with the three starters and give them a Terry or Lucario-like Mechanic where their Special moves vastly increase in power at certain level of high percentage to represent the Blaze, Torrent, and Overgrow abilities the starters always have.
Sinnoh: Cynthia with Garchomp - Cynthia is regarded as one of the most well-known (and scary) Elite 4 Champions thanks to her high leveled Garchomp that can one-shot teams. The main mechanic introduced this gen itself was the Physical/Special Split (in prior games, whetehr a move was considered a 'Special' attack or 'Physical' attack was based solely on the elemental type of the move) so there's not much to incorporate there. I think Cynthia and Garchomp would just be the best to use. I think she'd work best if it were Cynthia herself fighting and Garchomp would come out for Specials & some Smash Attacks (like how the members of the Ginyu force, Jeice, Burter, Guldo, & Recoome, come out during Captain Ginyu's various moves in DBZ: Fighterz).
Unova: Sawsbuck, Accelgor, & Escavalier - The new Mechanic for Gen 5 was the introduction of 'Seasons' which affected spawn rates, specific pokemon spawning, and even weather. Sawsbuck itself actually changed appearance depending on the region, so it would be a good Pokemon to use and it could change depending on the Stage. As for Accelgor & Escavalier; both of them represent the new Trade Evolution introduced. You have to trade two specific pokemon for one another in order to get the other to evolve. It was a pretty unique method and the two of them are actually good pokemon.
Kalos: Diancie, Florges, & Aromatisse - Gen 6 introduced the 'Fairy' types and the concept of 'Mega Evolution'. Mega Evolution has already been used in Smash 4's Final Smashes (for Charizard & Lucario) and is still in use for Lucario & Mewtwo (just Mewtwo Y, though) so I think it'd be best to make this trio be 3 fairy types that were introduced and the Final Smash can be the two of them helping Diancie allowing it to Mega Evolve.
Alola: Incineroar, Silvally, & Alolan Raichu - Gen 7 introduced Z moves which we've got in Incineroar's FS (and he's already in the roster; might as well just fold him into this character concept) and it also gave us region variants and Legendary Pokemon that could actually evolve (Type: Null, Cosmog, & Poipole). Having Silvally represent one of the first Legendary Pokemon (Type: Null) that came about due to Evolution would work and having Alolan Raichu could represent Regional variants while also giving players the chance to play all forms of Pikachu now.
Galar: Rillaboom, Toxicitry, & Dragapault - No connection or real reason behind these picks aside from just liking them. The biggest mechanic added this gen was Dynamaxing & Gigantamaxing which can only be represented in a FS, so it doesn't matter who you really pick here.
