Just wondering because like I have no idea what half the professors study, and I can't even remember the Ranger professors skskskskskksks
Professor Oak specializes in Human-Pokemon Relations.
Professor Elm Studies Pokemon abilities and Breeding.
Professor Birch studies Pokemon habitats
Professor Cozmo studies Meteors
Professor Rowan Specializes in Pokemon Evolution.
Professor Juniper Specializes in the origins of Pokemon
Professor Sycamore studies Mega evolution
Professor Kukui Studies Pokemon attacks
Professor Burnet Studies Pokemon from other dimensions
Professor Mohn Studies UBs
Professor Magnolia specializes in dynamax
Professor Sonia specializes in galar history
Professor Willow studies Pokemon habitats (from Pokemon go)
Professor Krane (pokemon XD: gale of darkness) studies shadow reversions
Professor Hastings created the capture method (pokemon ranger)
Professor Grand Oak created Pokemon home
Professor P in Pokemon Trozei
Professor Bellis in Pokemon masters XD studies in the relationship between Pokemon and sync stones
Professor Mirror in the new Pokemon snap studies the Illumina Phenomenon.
Source: The respective Bulbapedia pages