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