Solatorobo, right?
Man, what a weird fucking game it is, I have so many conflicting opinions about it.
On one hand, the art direction for the backgrounds is amazing, it pulls off really impressive stuff for a DS title, the gameplay is pretty fun and innovative (if a little repetitive towards the end), and Tetris upgrade systems are always a plus.
On the other, the plot and some of the character designs feel very 2005 deviantart to me. It's like they put 5 weeaboos in a room, gave them a bag of coke and a gamecube with sonic adventure 2, locked them inside for two weeks and asked them to write a story.