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