This is guide will teach you how to apply Themes on Android.
Basic prerequisite-
Basic knowledge of editing apps.
Any apk editor (I will be using MT manager
The Actual Guide-
Download and Install MT manager( just give it a search on r/ApksApps)
Download pokemmo Android APK.
Download any theme you like.
Open MT manager locate the pokemmo apk using the left hand side.
Go to assets/data/themes/default/res.
Now on the right hand side extract the theme you downloaded and open its folder
Same as before go to res folder in your theme
Select all the files on right side except bg2 and files that look a like(you can select by sliding file from left to right and deselect by tapping it)
Now come back to assets directory and go to /assets/data/sprites/textures on left side.
Now copy and rename the bg2.png on your right side to bg_00.png, bg_01.png, bg_02.png.
Select them and click add once more.
Come out of the apk file on left side.
Click on pokemmo apk file and then function -> kill signature verification
This should then give you a new apk file and now you can install it.
Now you should have a working pokemmo Android client with Themes installed..
AAa/assets/data/sprites/textures