(urgent)I am currently working on a plugin, and it will not work, unless players will not move if another player walks into them.
This is MCPE client-side decided. Look at SimpleAuth. Even before the player is registered/logged in, the server forbades the player to move. However the clients attempt to move because there may be another player, also, blocked at spawn. So the answer: no, unless the entity vanished.
Thanks for the help, but that would still push them if you ran into them, and the players can not move at all.
You can't help. If a client senses that it walks into another entity or another entity walks into it, the client would move slightly away from the other entity. In other words, when an entity pushes the client, the client will automatically walk away, and it is not the server that tells the client to walk, so you can't help about it.
nvm i get it now... sorry i am new at this stuff. and is your server up because i could not connect to it.
I think disguiseme works with mobs. Use that and if needed make a simple plugin to make a player turn into a chicken when the join using the "player.spawn" event