a database cant send data in realtime nor will be suited for it it's not ideal to do it because as the name implied database is used to store data not a realtime data sender
yep, then the option will be using a Proxy but Pocketmine doesn't works very well whit a proxy i don't think if has one.. but i have a question now, it's possible to send in realtime a data with websockets or using your website?
it might be possible to do so by creating a new packet which is only sent by servers to servers with authentications