
Unfortunally it isn't on the DS or the PSP, it's scheduled for a release on mobile phones.
For the mobile game, the townsfolk tossing action elements were tweaked into a point and click game to make Little King’s Story more accessible to casual players. Also new to the game is a social interaction system by which you can exchange treasures with other players to help complete their collection. Little King’s Story will be use a free-to-play model on mobile phones, although, players will be able to buy certain in-game items via microtransactions.
Marvelus had a quite bad financial year so it's logical to see this kind of projects, anyway if you own a Wii and don't have a copy of this game you're missing a lot.