>>14947075actually, now apparently, they do.
A lot of them seem lame like "theyr emember having a pokeball thrown at them and felt emotional" or "they remember a hard workout session, they felt sleepy"
but once in awhile youll get one like "It remembers encountering legendary pokemon, it was overcome with emotion" or even simple but poignant ones like "it remembers seeing its own reflection in a mirror in a cave, it was happy"
the memories arent random theyre actually based on things you do with the pokemon, but it seems like a lot of stuff doesnt "stick" or isnt as important for some reason.