Here is the full list of all 15 Shadow Fencer Theatre achievements.
Complete the first Intermission
Complete the Second Intermission
Complete the Story
Win the bonus match during end credits
Attempt Marathon Mode
Win Marathon to achieve Grandmaster status
Win a match in Improv
Player 2 wins a match in Improv
Win a Medley Match
Play Training to prepare for a scene
Win a round by throwing your weapon or punching
Win a match by throwing your weapon or punching
Win Story Mode without the need to rematch
Grandmaster time of less than 9 minutes
Play all the skits