The official website for PokéPark Wii has released some new information.
First we got the names of some more mini-games:

Empoleon's Snow Slider - Control a water Pokémon through an obstacle course (similiar to Gyarados Marine Slider)

Blaziken's Punching Rock - Control your Pokémon with the Wiimote to punch rocks shot at you.

Dusknoir's Running Crash - Control your Pokémon through an obstacle course for the best time.

Absol's Hurdle Succession - Control your Pokémon to avoid random Diglett in the path of a race (boy there sure are a lot of "racing" games here)

Bastiodon's Panel Crash - Shoot balls at panels that fly by for the highest score.

Finally, we know of the moves that Pikachu has. He knows Quick Attack, Iron Tail, and Thunderbolt.

Source: Serebii

This is really starting to remind me of Mario Party now! I wonder how the "main game" will be that will tie all these minigames together?

Have the 'Pokémon Snap-like' features been revealed in any depth yet? The original was a great game and it desperately needs a sequel to some degree.

So is there a story? Adventure? Or is it all mini-games?

I hope this game is good.