UPDATE 15/5/14 8.40am Nintendo has shown off the first footage from The Band of Thieves & 1000 Pokémon, which contains sticker-like characters similar to the company's Paper Mario series.
The free downloadable game allows you to collect Pokémon critters via StreetPass. Users who take their 3DS to a cinema showing the upcoming Pokémon movie will also unlock something extra.
There's still no word on whether the title will get a European release.
ORIGINAL STORY 13/5/14 10.15am
Currently only confirmed for a Japanese launch, the title will let you collect Pokémon via StreetPassing other users, then take them into battle.
Announced in the latest issue of CoroCoro magazine (thanks, Serebii) the title stars sticker-shaped versions of famous Pokémon critters.
1000 Pokémon is due to launch ahead of the upcoming 17th Pokémon movie, Diancie and the Cocoon of Destruction, which gets a Japanese cinema release in July.
Will 1000 Pokémon launch in Europe too? Nintendo UK told Eurogamer this morning that it had nothing to announce at this time.