>>54003887And Professor Oak, the pre-eminent authority on all species of Pokemon, apparently needs two 10-year old kids to go across the world and gather information for him despite spending his entire life's research into Pokemon.
Professor Birch would be surprised by Alolan/Galarian variations of pokemon despite being the foremost expert on habitats.
Professor Rowan, as above, despite being the authority of evolution and form changes.
Professor Sycamore is also somewhat clueless on Mega Evolutions and would have no idea about Dynamax/Gigantamax.
Besides, Professor Elm in the anime and manga series shows he has knowledge of pokemon eggs, consulting with the main cast of the Anime and Adventures regarding eggs. Likely, he was simply surprised that there was an egg for him, rather than "omg eggs exist" given that most people in the world fucking understand that pokemon come from eggs.