Every mainline Pokémon game prior to the Nintendo 3DS entries were just a graphical evolution of the sprite-work design of the original Red and Green. X and Y were arguably the first games to truly implement an art style in the definitive sense.
He's more than likely going to be using her Platinum team because Togekiss has appeared in Cynthia's roster for Pokemon Platinum, Pokemon Black/White and Pokemon Black 2/White 2.
Contests were in Pokemon Diamond/Pearl.
The Pokémon Company can go completely left field and have Zacian and Zamazenta, Toxicitry or Sirfetchd. We can't narrow it down to Cinderace just because he's the favourable starter Pokémon.
Galarian Meowth and Yamask were branched evolutions but Galarian Mr. Mime is not. There's no reason to add Mr. Rime to the Sinnoh Pokédex.
In HeartGold and SoulSilver, the Pokémon that were added to the Johto Pokédex were the ones that evolved via moves. The Kanto and Johto Pokémon that evolved...
Regional variants are arguably the most favourable modern addition added to the Pokémon series, it brings new life into pre-existing Pokémon. Sun and Moon introduced the concept whilst Sword and Shield had regional variants of Pokémon gain new evolutions.
With Brilliant Diamond and Shining...
An issue which was fixed in Platinum. In fact, Platinum's Elite Four roster made fundamental changes to the team like Aaron replacing Dustox and Beautifly with Yanmega and Scizor and Lucian having Espeon and Gallade instead of Girafarig.
The Pokémon company is marketing these games as "faithful...
The Elite Four are going to be using their Platinum Pokemon roster because there's absolutely no way that they'll make Flint a Fire-type Elite 4 member with only two Fire-types again.
Just like the title says, do you think these three starters will get a special form like a Mega Evolution or an Ash-Greninja like form?
I believe they will.