Hi, I'm trying to make a mod that checks when a client is disconnected from the server because it doesn't have Pixelmon installed. Is there an event that fires when this happens? I would also like to the get the message of the event that is logged on the console and send it to bungeecord

Pixelmon has been taken down per request as of 2017, and any remake or addon for it is of questionable intention corresponding with the copyright held by the Pokemon Company. Also, 1.12.2 is not supported on this form, please see the above banner for the currently supported versions.

Ok but how would I catch this event for another version of forge and a generic required mod missing in the client?

I won't go through that whole process if this feature isn't supported anyway. I've got players that wanna play and a server that has to be paid. I'm just really trying to learn since this is my first mod ever.