Hollow Space (Map)
A Hollow Space (Map) is an item which will unlock the Hollow Space rumble area which can only be explored by a Dragon type Pokémon.
How to obtain it
You can obtain a Hollow Space Map by opening Mystery Boxes
How to use it
If you have the Hollow Space Map in your item bag, you will be able to send a Dragon type Pokémon to a special rumble area.
By sending out a Dragon type Pokémon to explore this rumble area, it will battle Heatran. If your Pokémon wins the battle, it will return with a Magma Stone. If it loses, it will return with the map, allowing you to re-send the Pokémon to the area.
Other
- Hollow Space Maps are trade-able.