Rideable Zombie Horses
For the first time ever, the Rideable Zombie Horses modification allows you to ride a zombie horse. This zombie horse is twice as fast as a regular horse. Some controls for the zombie horse differ significantly from those of a standard horse, so be sure to read the mod description carefully below!
How to Ride Zombie Horses?
Zombie horses cannot be found in the world of Minecraft Pocket Edition. To obtain one, you need to use a zombie horse spawn egg.
Tame the horse just like you would with any other horse. Simply sit on its back until it loves you. Once the horse is tamed, heart particles will appear. 
To ride the horse, you will need a saddle. Press the “sneak” button and click on the horse to open its graphical interface. Here, you can equip the saddle on the horse.
Once the saddle is equipped, you can ride the horse. The advantage of this horse is that it is twice as fast compared to a regular horse.
You can heal the zombie horse by throwing a splash potion of harming at it. This may seem counterintuitive, but it works! The horse will also regenerate health over time. Under no circumstances should you feed the horse rotten flesh, as it will die.
Installing Rideable Zombie Horses (.zip):
- Download the addon below.
- Extract the Rideable Zombie Horses folder from the archive.
- Move the Rideable Zombie Horses folder to the /games/com.mojang/resource_packs/ directory.
- Launch Minecraft Pocket Edition.
- Create a new world or edit an existing one.
- Apply the resource pack you previously moved to the resource_packs folder to the selected world.
- Done! Restart Minecraft PE and enjoy the game!
Installing Rideable Zombie Horses (.mcpack):
- Download the addon below.
- Immediately after downloading, run the file.
- Open it with Minecraft: Pocket Edition.
- Launch Minecraft Pocket Edition.
- Create a new world or edit an existing one.
- Apply the textures you previously imported into MCPE to the selected world.
- Done! Restart Minecraft PE and enjoy the game!