Felt like this warranted its own post instead of tacking it onto that reply:
Obviously the more hands-on presence of Game Freak is the major factor here, but I like how, since unlike most other spin-offs, Pokopia actually takes place in a main series region, it tries to hew much closer to the established aesthetics and logics of the main series. A lot of the classic fanfares and sound cues are there, the Mystery Gift feature and its corresponding music are there, tons of held items from the main series appear as relics, Pokémon Centers and PCs serve as the main hubs for the player, route gates are used for dividing up the map, and you have things like Leppa Berries being the first food source you’re introduced to for restoring PP. And when you’re about to meet a new Pokémon, even the grass shakes three times first as sort of an inverse of how a Poké Ball shakes three times before a successful catch.
I also really, really adore the choice to use Ditto as a mascot and main character for the game. In the main series games, it’s always been a very gimmicky Pokémon that I’ve never given any real thought to using outside of breeding. But in the context of a game like Pokopia, it’s pretty much the perfect choice to facilitate very versatile gameplay mechanics, as it’s a Pokémon that can pretty much be whatever it wants to as long as it has something to mimic. The choice of Pokémon and moves that form the array of utilities available to Ditto feels very cleverly chosen all around. Like Rototiller, of all things! Stockpile and Spit Out to store and place blocks! And I love how Ditto’s blobby nature is also expressed in instances like being able to squeeze through one-block spaces or shrug off drops that would logically result in fall damage.
Not only that, but Ditto is also perfectly emblematic of the nature and essence of the game itself, as a free-form sandbox building game. Shape the world however you want, while playing as a Pokémon that can shape itself however it wants. That’s just good, cohesive theming right there.