Pokémon Rumble World is a brand new entry in the Pokémon Rumble World series. It includes over 700 different Pokémon, from Pokémon Red / Blue to Omega Ruby / Alpha Sapphire. It will be Free to Play, with microtransactions, and comes out on April 8th on the Nintendo 3DS (exclusively on the Nintendo eShop).
Here’s the part dedicated to the game in the European Nintendo Direct:
Here’s the Japanese trailer for the game:
And finally, the logo and an artwork:
Pokémon Rumble World (3DS eShop) comes out on April 8th, worldwide.