Today, an announcement was made on the Official Nintendo Magazine UK that Pokémon Rumble Blast (Japanese: スーパーポケモンスクランブル Super Pokemon Scramble) will be getting a European release this December. A specific date has not yet been announced.
For this release, the game will be known under a new name: Super Pokémon Rumble. This is closer to the original Japanese title than the US localization. The reasons for the renaming remain unknown.
The US version releases on October 24. The game has been available in Japan since last Thursday.