Here is the full list of all 57 MY HERO ONES JUSTICE achievements.
Win 50 battles using heroes.
View 20 characters' battle entrances.
Complete Map 6.
Complete Maps 1 to 6.
Complete Map 5.
Complete Map 4.
Win 20 battles using heroes.
Obtain 300 player customization items.
Perform 50 Plus Ultras using heroes.
Obtain 450 character customization items.
Obtain 350 character customization items.
Obtain 250 character customization items.
Acquire 100 titles.
Complete "All For One."
Complete "Complete Victory."
Obtain 150 character customization items.
Complete "Encounter."
Complete "A Real Hero."
Complete Map 3.
Obtain 200 player customization items.
Fight 50 online battles.
Fight 30 local matches.
Get a perfect win 10 times in online or local matches.
Fight 10 local matches.
Win 50 battles using villains.
Reach a combined character level of 100.
Collect 100,000 hero coins.
Reach a combined character level of 50.
Complete Map 2.
Perform 50 Plus Ultras using villains.
Win 20 battles using villains.
Obtain 100 player customization items.
Fight 20 online battles.
Use sidekicks 100 times.
Complete Map 1.
Trigger 50 wall rushes.
Collect 50,000 hero coins.
Use sidekicks 50 times.
Fight 5 online battles.
Acquire 20 titles.
Complete "One For All."
Perform 1,000 combos against opponents.
Complete "Climax."
Use sidekicks 10 times.
Complete "Up and Over."
Complete "Re-Ingenium."
Get an Ultra Finish.
Complete "Bizarre! Gran Torino Appears."
Use Quirk Specials 100 times.
Fight 100 local matches.
Fight on 5 stages in local matches.
Obtain 400 player customization items.
Complete every story chapter.
Complete every story chapter with an A-Rank or above.
Reach a combined character level of 500.
Complete Score Attack Mission.
Complete Maps 1 to 6 with an A-Rank or above.