The official rankings for this game are already hosted at the-elite.net. This is why there was not already a page for this game available on this website. Please delete this page in order to avoid confusion and misinformation. Thank you.
Co-op runs of the N64 version have been done a couple times in the past, but nobody really keeps track of them. The biggest problem is that co-op on N64 is so laggy it's nearly unplayable, and I don't know exactly how netplay would work out on emulator versions of the game. Here's a Crash Site SA co-op by Icy and Flickerform
The speedrun.com page for Perfect Dark is only for emulator speedruns of the game, which basically nobody cares about. There are discords for the XBLA version of the game (https://discord.gg/cTYmmv2), and for The-Elite.net, which is the official host for Goldeneye and Perfect Dark speedrunning exclusively on the original N64 hardware (https://the-elite.net/discord).