
Operation Rainfall writes: "Not having played Theatrhythm Final Fantasy, I don’t know for sure if Rhythm Thief is the best rhythm-based game on the Nintendo 3DS. What I do know for sure is what Xeen and Sega have shown me is the gold standard for what a rhythm game should do.
It should use just about everything that a system offers. If it has a touch screen, it should utilize the touch screen. It is has buttons and a D-pad, it should use it. If it has gyro-controls, it should use gyro-controls. Pretty much the only things they didn’t use were the camera and the microphone – and I don’t know how they would have used the camera.
This game has faults, yes, but the faults are more or less personal annoyances than bugs in the game. This is well worth a buy."

The top 10 rarest 3DS games of all time are probably ones you both did and didn't expect. Especially if you had these games!
I have Fire Emblem Fates LE, the European one. Not sure if it's as valuable as the US version, but it certainly was in high demand.
Its not often I actually have games on the 'most expensive list' but I do own Rhythm Thief and Layton vs. Ace Attorney. I believe both of them are sealed as well.

AUTOMATON's Aki Darwich introduces Rhythm Thief & The Emperor's Treasure - a rhythm-based Nintendo DS title which you may have missed, but which definitely deserves a second chance.

Sega has been on a downward spiral for the last few years, they have failed to really reignite the flame for the Sonic series and haven’t really been able to deliver a must have game for a while. With this being the case many planned projects had to be cancelled but really what is surprising is how one game managed to slip through the cracks and that game being Rhythm Thief. The question is however why did this game slip through? It is simple some toe tapping music and a great story that really is set to deliver.