>>58011526
As someone who has managed to name every single Pokemon in under 40 minutes multiple times, the ones I have the hardest time remembering are:

>Inkay/Malamar
>Dedenne
>Comfey
>Stufful/Bewear
>Bounsweet/Steenee/Tsareena
>Pyukumuku
>Cramorant
>Falinks
>Fidough/Dachsbun
>Shroodle/Grafaiai

I can usually crank out Gens 1 - 5 pretty quickly, but Gens 6 - 9 take me most of the remaining 40 minutes while despite comprising only 1/3rd of the Pokemon.