The gaming forum Neogaf has posted a thread regarding the upcoming Nintendo releases for the second half of 2010. Waldmeier AG, the Swiss distributor of Nintendo products has indicated that PokéPark: Pikachu's Great Adventure will be released there on July 30th, 2010. Nintendo has yet to officially announce the English version of the game.

As previously revealed, the Austrailian Rating board OFLC recently reviewed the game. Below is the classification info from Australia.

Classification: G Consumer Advice Category: Computer Games Version: ORIGINAL Duration: Variable Date of Classification: 04/15/2010 Author: CREATURES INC. Publisher: NINTENDO CO., LTD. Production Company Country of Origin: JAPAN Applicant: NINTENDO AUSTRALIA PTY LTD File Number: T10/1650 Classification Number: 240515

Sources: OFLC PokePark & neogaf

While this only indicates a tentative release date for the game in Switzerland, generally Nintendo games are released at the same time in Europe. Even though the game has been classified in Australia, it will probably launch there after North America and Europe.