MCPE Plugin - A highly customizable (POCKETMINE -No Other Forks- PLUGIN) that enables you to send a custom message when a player joins the server.
PocketMine - No Forks -
API - 3.0.0 ALPHA - 8,9,10,11,12,13,14,15
Add Colors Add IGNs on join
It prints "JoinMessage enabled" into the console when the server starts.