Here is the full list of all 38 Meltys Quest achievements.
Get the Pure Ending while in Princess Mode.
See all six endings.
Defeat the final boss on True Princess Mode.
Defeat the secret boss on True Princess Mode.
Defeat D.M.U. on True Princess mode without retreating during the fight.
Mano a Mano Defeat Dark Limey using only Strike skills, Guard or Items.
Obtain the sword of a king.
Defeat Dark Globbers while only using Love Shot or Love Wave to do damage.
Read Garnet's letter.
Have exactly 7 in all three cream related experiences.
Defeat Dark Lilf while wearing an Apron.
Let Dark Pietra defeat herself.
Give life twenty times.
Oh hey, didn't see you there.
View the hidden ending.
Got Milk?
Obtain the secret outfit.
Face the first boss of True Princess Mode.
Defeat the final boss while only using Love Shot or Love Wave to do damage to the final boss.
Wear the JK Clothes.
Slay a relic of the past.
Save the world.
Time to kick some butt!
Achieve bliss a total of 100 times or more.
Pointless, useless, futile, meaningless.
Complete the rebuild of Castle Rothstein.
Wear only what you were born with.
Learn a Skill from using an Item.
Wear Melty's new favorite battle outfit.
Pick the fourth option while talking to Zanelli.
Defeat a chicken. Wow.
Help someone prepare for their graduation.
Cannonball!!
Meet the wandering swordsman while having done the oldest profession in the game five times or more.
Mine an iron ore.
Wear the Nurse Uniform.
You lost on purpose didn't you.
Give the Red Potion to Rudolf.