tokatsu

Trying to create a legal solgaleo from a sun copy I encountered that OP memory only shows legal if it's "Solgaleo seems to have a fond memory, but it doesn’t seem to be able to remember the details...". I know that memories werent a thing during gen 7 after being introduced in gen 6 but isnt that memory for event pokemon only? Does someone know if any pokemon caught in gen 7 has that memory when transfered to gen 8. If not how can I fix it so it marks it as legal?