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