Another feature of this addon is that you can ride almost every mob in the game, the only downside is that you can't control it. You can also force your pokemon to fight against another one, just by hitting it with your hand.
Credits: Hexdro
How to install addons:
- Download and unzip archive
- You will get one or few folders
- Put textures folder into /games/com.mojang/resource_packs
- Put behavior folder into /games/com.mojang/behavior_packs
- Open Minecraft Pocket Edition
- Create a new world or edit an existing world
- Scroll down into Add-ons section and select the ones you want to apply