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