Here is the full list of all 51 Persona 4: Arena trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
You have completed all the Challenges! Funky Student would be proud.
You have completed 300 Challenges.
You have completed 150 Challenges.
You have completed all of one character's Challenges!
You spent 30 minutes in Training in one sitting. Now take it to the streets!
You've aced all the tests.
You were afflicted with every ailment in Arcade Mode or online. Not even Mr. Edogawa can help you.
You lost in Arcade Mode or online before you Awakened... That's sad. Here's a consolation prize.
Mystery Food X is yours!
You completed Arcade Mode with all characters.
You used every character's Instant Kill move in Arcade Mode or online!
You have used all the characters in Arcade Mode or Online. Variety is good for you!
You performed 50 Instant Blocks in Arcade Mode or online.
You performed 20 One More Bursts in Arcade Mode or online.
You won 30 Rounds in Arcade Mode or Online by using SP Skills or Awakened SP Skills.
You performed 100 Furious Actions in Arcade Mode or online.
You performed 30 Fatal Counters in Arcade Mode or online.
You finished an All-Out Attack with a Fatal Counter in Arcade Mode or online.
You created 10 Persona Breaks in Arcade Mode or online.
You performed 100 Auto Combos in Arcade Mode or online.
You completed Arcade Mode with one character.
You suffered a Persona Break in Arcade Mode or online. It happens to everybody...
Have you burned your dread? Or reached out to the truth?
You defeated an opponent in Arcade Mode or online before he Awakened! Now, that's a real challenge!
You have seen all the Story endings.
Akihiko's Story chapter has been told.
Teddie's Story chapter has been told.
Elizabeth's Story chapter has been told.
Naoto's Story chapter has been told.
Aigis' Story chapter has been told.
Yu's Story chapter has been told.
Yukiko's Story chapter has been told.
Mitsuru's Story chapter has been told.
Kanji's Story chapter has been told.
Chie's Story chapter has been told.
You've created a Title for your online matches.
Yosuke's Story chapter has been told.
Labrys' Story chapter has been told.
You watched a Replay in the Theater. Are you as good as you remember?
You have completed 100 online matches, win or lose. No bear puns here. Congrats.
You've battled against every character in online matches. You're a grizzly'd warrior now!
You have reached Level 30 by playing online matches!
You have reached Grade C in Ranked Matches.
You performed 100 All-Out Attacks in Arcade Mode or online.
You've earned your first online victory! You've bear-ly scratched the surface.
You had a perfect victory in Arcade Mode or online.
Tuned In
You have mastered P4A.
You completed Stage 6 in Score Attack.
You completed Score Attack Mode with one character.
You completed Score Attack Mode with all characters.