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