https://pokemondb.net/pokebase/meta/62107
I read this and understand why necroposting wouldn't be a thing on Pokebase. I had flagged that comment because it was on an almost 2 month old post and only contained the poster's personal opinion on Weavile, not adding much information. Such comments would count as "unnecessary necroposting" (if that's what its called), right? But if you think the comment is fine then that's the final decision!
And its nice to know flagging uninformative old comments is fine. I once flagged an old non-sensicle comment which got hidden but afterwards I felt like I was just disturbing the staff and never flagged such comments again.