Pokémon Sword & Shield is currently the hottest version. We all know that this version adds many new pokemon as usual. In addition, what attracts players is more the addition of new functions and mechanisms. But for the overall development of the game and the improvement of the system, many things have been deleted. For example, a batch of actions such as Assist, Bouncy Bubble, and Mirror Move is invalid in this version.
Pokémon in battle. The volume of Pokémon inside the series had grown so large by Gen VIII that The Pokémon Company thought we would cut the roster in Pokémon Sword and Shield, leading to your so-called Dexit controversy.
The dimensions of the Pokémon series meant the developers made a decision to reduce the scope for Gen VIII. This meant an inferior number of available Pokémon within the Galar region, combined with the removal of Mega Evolutions and Z-Moves. It wasn't unknown for the Pokémon series to eliminate elements between generations, however, it had never visited this degree before. This ended in a vocal backlash against Pokémon Sword and Shield through the fans, who seemingly took within the discourse all around the games. Ultimately, the Dexit situation didn't affect sales, as Pokémon Sword and Shield took over as third best-selling entries from the history in the series, behind only Pokémon Gold and Silver and Pokémon Red and Blue. A quantity of Pokémon returned towards the series alongside The Isle of Armor and The Crown Tundra DLC expansions, but it is possible to plenty of Pokémon which can be currently in limbo.
It wasn't just Pokémon that had been cut from the jump to Gen VIII, however. The Pokémon Company took the opportunity to cut moves from your game also. If a Pokémon is traded into Pokémon Sword and Shield, they'll likely keep the move, but it really cannot be found in battle. These moves have a very generic description, proclaiming that they are not used and really should be forgotten. Once the move has become deleted, it can not be restored. All Z-Moves were cut from Pokémon Sword and Shield, but there were clearly also regular moves that are taken out in the series, too. A big victim of the cuts would be the special partner moves on the Pokémon: Let's Go games, while they were also for the Nintendo Switch. These were exclusive for the Eevee and Pikachu from those games and so they existed to produce the starter Pokémon viable through the entire whole game, making it not surprising they were cut from mainline entries within the series.
Just as a move was cut in Pokémon Sword and Shield, that doesn't mean that it's gone forever. There were some moves cut from Pokémon Sword and Shield that returned within the Expansion Pass because Pokémon these were associated were added back on the series. This includes Kinesis, the signature move of Kadabra and Alakazam, once they returned in The Isle of Armor expansion. The revolving door nature on the series forward motion means any move can return, nevertheless, it also means classic moves may be cut later on Pokémon online games.
Although these actions have been removed, there is also game content like Shiny Pokemon, and stadiums are retained, and the new game contents are also loved by many players. The game is also progressing like social life. For example, players used to spend a lot of time capturing pokemon, and they like to devote themselves to this game content. However, with the introduction of more attractive game content, many players will choose to Buy Shiny Pokemon directly, so that they have more time to invest in it.