Here is the full list of all 15 MY HERO ULTRA RUMBLE achievements.
Reach Pro rank.
Get the highest rating 200 times in total in Ranked Match results.
Become Champion 100 times in total in Ranked Matches.
K.O. 300 opponents in total in Ranked Matches.
Reach Player Level 50.
Obtain 1,000,000 Agency Points in total.
Send 10,000 Likes in total.
Obtain 1,000,000 Gold in total.
Purchase an item at the Shop 100 times in total. (Purchasing multiple items at once only counts for 1 time.)
Obtain 1,000 ★ in Missions in total.
Obtain 50 Emblems.
Reach Amateur rank.
Create a "My Banner"
Unlock 10 Illustrations in the Gallery.
Complete the Tutorial. (Can be achieved even if Tutorial is skipped.)