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