According to a recent rumor by Riddler Khu (assuming it is translated correctly), it appears that Aipom and Gligar will be receiving new regional forms or regional fakes in the upcoming DLC for Pokemon Scarlet and Violet. However, it is important to note that it is also possible for any purple Pokemon to receive this treatment in the aforementioned games.
For those unfamiliar with the term, regional fakes refer to new Pokemon that resemble existing ones. An example of this is Paldean Wooper, which is a variant of Wooper specific to a certain region. Toedscool, resembling Tentacool, and Wiglett, resembling Diglett, are considered new Pokemon that have evolved from older ones, and are commonly referred to as regional fakes by Khu and many fans.
According to Riddler Khu, a Regional Fake will transform at least one purple Pokemon into green. Although there are several purple Pokemon in the franchise, Pokemon Scarlet and Violet have recently highlighted Aipom and Gligar in their limited marketing for the DLC. These two Pokemon are exclusive to their respective versions, suggesting that the other version may also have a regional fake of these Pokemon, which would be green. Interestingly, players of Pokemon Scarlet and Violet can obtain Diglett in both games, despite the presence of Wiglett.
The implications and specific details of this are yet to be revealed. If Aipom and Gligar are indeed the correct Pokemon, fans can expect the regional fake versions to have a similar appearance to their counterparts, but with some distinct features. Additionally, they may introduce a new type, with the emphasis on green possibly indicating a Grass-Type. Considering Gligar's scorpion-like design, it would be logical for the Gligar Regional Fake to become a Ground/Grass-type. On the other hand, Aipom's transformation could involve a more relaxed monkey, in line with its potential new type.
Riddler Khu, despite being reliable and having a proven track record, has a consistent habit of not being direct with their leaks. Consequently, until any information is officially confirmed, it is advisable for Pokemon enthusiasts to view all rumors and leaks regarding Pokemon Scarlet and Violet as mere speculations with no substantial basis.
Currently, Pokemon Scarlet and Violet can be played on the Nintendo Switch.