Here is the full list of all 12 Memoranda trophies - there are 11 gold and 1 platinum.
Earn all trophies.
It starts with "Monkey".
Took every humanimal's photo.
Helped the stranded sailor.
Found all the backer pictures.
No one's stopping you now!
Changed the music in Mizuki's home.
Seems like he had an appropriate name!
Managed to get the card "signed" by Phil.
Found the Spaghetti Man.
Found the frequencies for Qardash.
Solved the puzzles in the doll maker's house.