Here is the full list of all 9 Capsule Force achievements.
Play on an alternate stage layout
Complete all Advanced Target Practice missions with a C Rank or higher
Complete all Dash missions with a C Rank or higher
Complete all Danger Zone missions with a C Rank or higher
Complete all Target Practice missions with a C Rank or higher
Use an alternate outfit in Versus Mode
Destroy 1-9-9-9
Complete Mission Rush
Achieve an S Rank on every mission