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