Here is the full list of all 31 Floor Kids achievements.
Perform all 4 of any characters combos in one dance routine
Perform a strobe while hitting a combo
Perform a hop, reversal and pose in one dance routine
Unlock all of Saboya's move cards
Unlock all of Raquette's move cards
Earn 5 crowns in a dance routine.
Hit all crowd requests in a dance routine
Unlock all achievements
Unlock all of Noogie's move cards
Unlock all of Scribbles' move cards
Unlock all of Bizzy's move cards
Unlock all of O-Live's move cards
Unlock all of Ruckus's move cards
Unlock all of Hiyo Ono's move cards
Earn 5 crowns on all tracks on The Studio
Earn 5 crowns on all tracks on The Corner
Earn 5 crowns on all tracks on The Metro.
Earn 5 crowns on all tracks on The Grocery.
Earn 5 crowns on all tracks on The Art Space.
Earn 5 crowns on all tracks on The Arcade.
Earn 5 crowns on all tracks on The Venue.
Earn 5 crowns on all tracks on The Peace Summit.
Recruit a full crew
Make it to the rooftop (Earn 5 crowns on all Peace Summit tracks and unlock the epilogue)
Hit a 10 on Flavor (Perform all 16 moves plus fly moves on any character in one dance routine)
Get a 100% perfect rhythm score in one dance routine
Perform a strobe for 4 bars without falling
Perform 50 Hops in one dance routine
Ace the rhythm section and fast tap in both choruses
Do 100 holds and poses in one dance routine
Earn over 100,000 points on a dance routine.