We've known about these 3 WiiWare games for a couple of months now, but not really known anything about them until now.
As you can guess from the 3 games' subtitles, Blazing, Stormy and Shining Adventure Squad, the games are themed towards the titular types of Pokemon - that being Fire, Water and Electric. The game you choose will decide what Pokemon you can select from - full list of starters in the full topic - as well as the areas in the game. Your save files can be used across all 3 games, meaning that to get the full experience, you'll have to shell out the 3,600 Wii Points to do so.
You can also connect your DS and use that as a controller - but it doesn't seem that there'll be any connectivity between these games and the previous DS Mystery Dungeon games.
Check out this video demonstrating the game running with the, now standard for WiiWare Pokemon games, low-def Ranch models and then head into the rest of the topic for the list of available starter Pokemon across each game: