Here is the full list of all 31 Rabi-Ribi trophies - there are 16 bronze, 8 silver, 6 gold and 1 platinum.
Finished Boss Rush Mode.
Started New Game+, also known as loop two.
Finish "Finding Memories"
Cleared the Halloween Event! And Erina got a new costume to wear? How about try to view her new outfit?
Finish "Fairy Attacks!"
Irisu came back to the town!
Upgrade 20 items to Lv.3
Cleared seven UPRPRC Midboss events!
Reach 999 combo during a boss battle.
"Sequence Breaking" to the extreme. What's going to happen? Not even the developer knows!
Miru came back to the town!
Defeated a boss in MAX rank!
Finally returned to where you started.
Returned from that strange place for the third time.
Defeat the director of Rabi-Ribi!
Holding 99999en!
Returned from that strange place.
Pick up a strange egg...What is this?
Return to Rabi Rabi Town.
Ribbon is now following you!
You must be a bunny lover!
Obtained every item!
100% map completion!
Get 10,000 points of score in sandbag mini game.
"She found a lot of people, but never came home..."
Collected all 70 easter eggs!
Finished True Boss Rush Mode.
Defeated all bosses in MAX rank!
Defeat the post game boss with 0% items! (Except amulet, consumable and Rainbow eggs).
Finished the main game in a super fast time!
Finished the whole game without touching a spike.