Collision on map to open Battle

[Mugaru]

Hi Phaser community, 

I'm new to game development and found the source of the game PixelQuest on CodeCanyon. 
What i would like to do in this game is to add a battle functionality like the one of Pokemon, so on random grass spots there should pop-up a 'battle screen' with an opponent and my own 'pokemon' 

Hope that someone can help me in the right direction :-) 

Kind Regards,

Mugaru

[Secretmapper]

You need to create a new state (a turn based/battle state). You can then switch to this as you go through the map.