This is a discussion topic for the Ore project, PokeSearch. View the full project on Ore for downloads and more information.
This plugin aims to add a simple version of a PokeRadar-like system to Pixelmon servers in the form of a server-sided plugin.
Players can create searches for specific Pokemon or specified types (boss, shiny, Totem) of Pokemon and when a Pokemon fitting the description of what the player is searching for spawns, it will notify the player!
Server owners can configure settings to better control what can be searched for, how often, and how much it costs to start a search in the settings.conf file.
For commands and permissions, please see the support channel of my Discord.