Here is the full list of all 22 SkyScrappers achievements.
Complete a four-player multiplayer game with all human players
Complete all the single player campaigns
Complete the single player campaign as Jessica
Complete the single player campaign as Kichirou
Complete the single player campaign as Solene
Complete the single player campaign as Phileas
Strike a flaming object into another character
Strike a falling object into another character
Hit an opponent with a ground pround attack
Win a game by landing on the roof of a building
Do a long jump trick
Win a match for the first time
Do a special move attack
Do a vertical rush trick
Do a jump of over 15m from an inclined platform
Do a special move jump
Completely fill your super bar
Do a slide trick
Win a game without losing any health
Finish a game with a weapon attack
Win your first round
Do a three point landing trick