Here is the full list of all 38 Monster Monpiece achievements.
Obtained all the achievements!
Got 500 kinds of cards!
300 successful First Crush ♡ rubs!
Si Ku Ork area cleared!
Cleared the game!
Triggered extreme love 100 times!
Irresistible Force
Won 100 offline battles!
Triggered extreme love 50 times!
100 successful First Crush ♡ rubs!
Tokio area cleared!
Won 70 offline battles!
Okinava area cleared!
Fukuruko area cleared!
Your Rub P stock has exceeded 10000!
Won 50 offline battles!
Trained for the first time!
Triggered extreme love 20 times!
Got 100 kinds of cards!
Ki Outo area cleared!
Ho Kaido area cleared!
Won 30 offline battles!
50 successful First Crush ♡ rubs!
Hollowlo area cleared!
10 successful First Crush ♡ rubs!
Triggered extreme love!
First successful First Crush ♡ rub!
Ginuma area cleared!
Won 10 offline battles!
Performed First Crush ♡ rub!
Kunaguva area cleared!
Performed fusion for first time!
Acquired a card for first time!
Won a card battle with 0 damage!
Won a card battle for the first time!
Attacked castle for first time!
Battled for the first time!
Started the game for the first time!