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