>>31789423They would have to be Pokemon that were never obtainable in Sinnoh in order to make any sense with the original games. Probably lots of bloating with fire and electric types to make up for the lack of them before.
>Ground/Fire Sinnohan Drilbur/ExcadrillMigrated to Mt. Stark due to Sinnoh's underground consisting of man-made tunnels, and after having adapted the Fire type, some came back to live near Fuego Ironworks.
>Ghost/Dark(/Fairy?) Yamask/CofagrigusThey're found inside the Lost Tower and are based on Japanese spiritual lore/practices for handling the deceased, instead of Egyptian ones.
>Poison/Electric Sinnohan Trubbish/GarbodorThey become energized due to the power generated by the Windworks.
>Ice/Ground Skiddo/GogoatThey live in the mountains. Ground is just there to make it slightly less shit/more interesting than pure Ice.
>Grass/Fire Sinnohan GourgeistTheir internal fire blazes more wildly to stave off the chilly Sinnohan climate and keep them alive.
>Water/Electric Mareanie/ToxapexThe strain that lives in Sinnoh developed a new shocking method of attack due to having a different diet. They need the speed and range of electricity because prey is faster in Sinnoh than in Alola.
>Ghost/Fighting SInnohan MimikyuIn Sinnoh, the most popular Pokemon is Croagunk rather than Pikachu. Sinnohan Mimikyu has observed this and not only dresses accordingly, but uses brute fighting techniques similarly.