Here is the full list of all 18 Ninja Senki DX trophies - there are 15 bronze and 3 silver.
Clear the game in 25 minutes or less in "Hardcore" mode.
Clear the game without dying in "Hardcore" mode.
Complete all "Perfect" challenges.
Get a score over 17500 pts. in "Hardcore" mode.
Get the best ending in "Hardcore" mode.
Defeat Shiro in 25 seconds or less.
Clear the game as the Ronin.
Obtain a gold medal in "Boss Rush" mode.
Defeat Yurei in 40 seconds or less.
Complete all "Speed Runner" challenges.
Get the worst ending.
Complete all "Collector" challenges.
Complete all "Assassin" challenges.
Get the best ending.
Defeat a Monban in 10 seconds or less.
Defeat Ryu in 30 seconds or less.
Defeat Tanuki in 10 seconds or less.
Get the 2nd best ending.