The game has been made available for Android through its patch Ver. 1.0.3, with the iOS version expected to follow later.
Here are more details from The Pokémon Company:
Enjoy fast-paced gameplay on the go
It’s easy to control your Pokémon with one hand. Clear stages by controlling your Pokémon as it moves forward. If you see enemy Pokémon, you can attack by just tapping the screen. Tap to engage in exciting gameplay action!
The islands and seas explored during your adventures change every two weeks
You may find unfamiliar and stronger Pokémon on new islands. So, journey through various islands and seas and collect more and more Pokémon!
Upgrade Pokémon of your choice
You’ll sometimes receive ore when you clear a stage. Refine ore to get power gears that you can use to make your Pokémon stronger. You may even be able to refine ore into a summon gear that calls forth a Pokémon to use a powerful move. Use power gears and summon gears to help your favorite Pokémon do well!
Test your strength using the Pokémon you’ve collected
Occasionally, you can earn rewards by working your way through the Super Boss Rush. You’ll need many different types of strong Pokémon to win each Super Boss Rush. Harness the power of the Pokémon you’ve collected from various islands and seas to defeat the powerful Super Bosses.
Pokémon Rumble Rush is available for Android via Google Play. The iOS version will launch later.