In 2021, Game Freak announced the hugely anticipated remakes of the 2006 video games Pokémon Diamond and Pearl for the Switch, and considering the big hardware upgrade after 15 years, expectations were serious. How could Sinnoh look without the limitations of a small portable device? How would the new mechanics of the franchise, like mega evolutions and Dynamax, affect the gameplay and story? What would be the equivalent of the Delta Episode from ORAS? And when the games were finally released in November, people's expectations were... Subverted, to say the least.

As anybody who cares about pokémon nowadays already knows, in this remake they were as faithful as possible to the original games. While ORAS removed many elements from Emerald, they were still 6th-generation games, with new mechanics, references, and pokémon from the new games, full compatibility with XY, and so on. Meanwhile, in BDSP you can only catch the same pokémon from the original games, elements from Platinum like Looker and Distortion World don't exist, and it's impossible to trade or battle between these remakes and Sword/Shield... But at least you can transfer pokémon to Pokémon Box and then transfer them from Box to other games!
This is a serious downgrade from remakes like FireRed/LeafGreen HeartGold/SoulSilver, as they aren't updating the original game to modern times, just porting it to a newer console so you can play it without buying an outdated console... With a price tag of $60. So, understandably, the reactions of fans and critics weren't positive.

However, to be honest, they added some quality-of-life updates that are a blessing, and I would even say that they make playing these remakes a smoother experience than the original games (outside of Platinum). As an example, HMs are now a Pokétch app, so you don't need a Bibarel as an HM slave with moves that you will never use in the main story like Defog and Rock Climb, and if you open the map you can select any city to fly right away, which extremely helpful.
The map also adds a flag to the next place you have to go, and some people would argue that makes the game unnecessarily easier, but I think that's one of the best additions because it fixes one of the most common complaints fans have with Sinnoh: The routes are so large and you need to do so much backtracking that it's easy to get lost and confused to where to go, especially if you are playing again after days of being busy and you don't remember what were you doing, which happens to me a lot with games like this.

The underground also had an overhaul, and now there are sections with pokémon that appear in the overworld like in Scarlet/Violet, and some of them are impossible to obtain on the surface until you defeat the Elite 4, so now you can use pokémon like Magnezone, Frosslass and Magmortar during the Main Story, which was impossible in the original games unless you obtain them via trading.
And, most important of all, everything feels fast! Sinnoh is infamously known for being extremely slow, not only in the pacing, as surfing, the HP lowering after an attack, and even saving takes a lot of time to the point is obvious. This, added to the huge routes and backtracking, can make exploration tedious, and parts like going from Veilstone City to Pastoria City feel insufferable and endless. But in Shining Pearl/Brilliant Diamond HP lowers in an instant, surfing is fast, saving is almost instantaneous, and running and using the bicycle feels way quicker, which makes the experience shorter, but a lot more tolerable.

So there are good things about the remake, but all these additions don't change anything about the plot, characters, map design, or anything from the original game, which means that if you already played them you won't get anything new from playing the remakes, and if you dislike Sinnoh I doubt this version will change your opinion, which is a shame, as previous remakes added so much that nowadays most fans will prefer playing FireRed/HeartGold than Yellow/Crystal, but in the case of Hoenn and Sinnoh there isn't a definitive edition, and playing Emerald/Platinum means that you will lose many quality-of-life elements, but playing the remakes means you will lose the better version of the story along exclusive elements like move tutors... And, to be honest, I really missed Looker and the Distortion World.

In conclusion, this is easily the laziest pokémon remake yet, even lazier than Pokémon Let's Go Eevee/Pikachu, but if you want to play Sinnoh and have to choose between the remake and Diamond/Pearl, I'd say the remake is the better choice thanks to all the quality-of-life elements that make the experience smoother. Platinum is still my favorite version though.