Funnily enough, I tend to forget Roggenrola exists and just think it's Boldore > Gigalith.Half the Unova Pokemon-- Larvesta, Elgyem/Beeheym, zen mode Darmanitan, Scolipede, and Gigalith.
Seriously. Until I looked at a Unova dex list, I thought Boldore was the only evolution of Roggenrola.
The same is true for me. I can get an image as soon as a name is mentioned, but I'll not remember them otherwise. Biggest offenders:I don't forget pokemon exist per se. I mean, if I just heard the name of a pokemon it would spring to mind immediately, but there are a few pokemon that when they show up I'm like, "Oh yeah, there's that thing in this game." When I think of pokemon, these are like the last ones I think of.
Quilfish, Shuckle, Dunsparce, Clamperl and Barboach.
There's only 2% chance of finding a Chimecho over there. While it is more common than finding a Wailord on Route 129 (1%), it is still pretty rare.There are a few that i less remember, but the one that i just keep forgetting exist is Chimecho in R/S/E. All i think that exist at Mt Pyre are Vulpix, Duskull and Shuppet. But when I learned about Chimecho being able to be found there, I searched for 30 minutes but no success. Until now, I just think of it as a Gen IV Pokemon.