Achievement Unlocked

Practice every song in Career mode at least once!

Guide
Once you've unlocked Take Care Of This World, head on over to Training and then to Practice. You will have to play through every song from beginning to finish in order to unlock this achievement. Just starting a song, and exiting does not count. Luckily, you don't have to actually play it, you can simply pick a song, ready up, and put the controller down. Do this with every song.

Perform 50 moves in a row.

Guide
See Dance Machine!

Perform 100 moves in a row.

Guide
This can easily be done on the first song, Angels. Make sure you do not miss any of the moves that scrolls down the line. You do not have to hit them with perfect score, you just need to hit them.

Change your outfit at least 10 times in Career mode!

Guide
Once you complete your very first song, you will open up a map. Go to the far right of the map (Training) and choose Styling. At this point, you only have a few clothing items available, but it does not matter. Change to your other set of pants, and press A. Then go back into Styling, change to your other pants, and press A again. Do this back and forth between both sets of pants 10 times in total.

In Career mode complete the first six songs.

Guide
You will need to complete the following songs with a bronze medal or more:

Angels * (Street)
The End Of Our Show * (Dance Club)
Everybody Dance Now * (Heliport)
Watch Her Dance * (Tunnel)
I Am The Guard ** (Airport)
Nothing Left To Say ** (TV Studio)

In Career mode complete songs 7-13!

Guide
You will need to complete the following songs with a bronze medal or more:

No Star ** (Street)
When The Night Falls ** (Heliport)
United *** (Marina)
Delhi Sunrise *** (Dance Club)
It Is Alright *** (Airport)
Everybody In Da House (Tunnel)
Hey Yo! **** (TV Studio)

Complete a song without any mistakes.

Guide
This can easily be done on any 1 star song, but is the easiest to accomplish on the first song, Angels.

Complete Career mode.

Guide
You will need to complete the following songs with a bronze medal or more:

You Are The Rainbow **** (Street)
Pump The Beat **** (Dance Club)
Mothers Be Aware **** (Tunnel)
Queen Of Drama ***** (Marina)
Shake And Move ***** (Airport)
Spanish Lullaby ***** (Heliport)
Take Care Of This World ***** (TV Studio)

Finish Career mode with a gold medal for each song.

Guide
This is by far the hardest achievement in the game, because it takes a lot of skill, and especially, timing. You need to aim to hit every move perfectly. Each move you barely hit scores you 10 points, while hitting them perfectly scores you 20. Plus you will gain more Magic Power, which multiplies your score by up to 4x whenever you hit a move perfectly. When you do a perfect move, a text will appear above the move scroller that says either "Yes, sirree sir!", "Fantastic!", or "Perfect!". I'm not sure if it makes any difference what text is shown, but it might have something to do with the amount of Magic Power gained, but I'm not sure.

If you get the groove down to the point where you hit each move perfectly, you will build alot Magic Power. If you hit a move perfectly while not using it, you'll get 20 points, but if you are using Magic Power, it will net you 80 points. It goes without saying that you should deploy Magic Power anywhere in a song where there are loads of moves that you are able to hit without problems. At the end of a song, you will see how many points are needed for a gold medal, and how many points you are trailing, so that if you are doing everything right, but still haven't got it, use Magic Power more wisely. Sometimes it can be better to use 2x, or 3x in sections of a song, instead of waiting a while with full Magic Power meter for a section with loads of moves.

Once you really get the hang of the game, you should be able to beat any song with ease up to Take Care Of This World. That particular song is way harder than the second hardest ***** song. You will be bombed with moves, and you will really need to focus to even get close to the gold medal. No worries, though, like any other song in this game, you will eventually be able to beat it. It just takes some patience. And skill, of course. Good luck!

Achieve a high score for a performance in Co-op mode.

Guide
Just play through any song in cooperative mode. Do it on your own on the song Angels. You really can't miss it even then!

Achieve a high score for a performance in Competition mode!

Guide
From the Main Menu, choose Multiplayer and then Competition. Turn on a secondary controller, and press X to join in. Pick any song, and hit the first move with your main controller, then put both controllers down. Let the song finish, and the achievement unlocks, given that you haven't filled the high scores with good scores, of course. In that case, you will have to beat at least the lower score!

Two players have to complete a song in Co-op mode without any mistakes.

Guide
You can do this achievement with any novice player, really. You can even do it on your own, if you're confident enough. Like always, just pick Angels, as that is by far the easiest song in the game.