The full 949 title and 24 plushie list, and how each of them is earned.
Every pull from the gacha machine costs 1 coin and awards a random title from a 921-title pool. Each pull also carries a small chance to hit a jackpot instead and award one of the 24 plushies rather than a title.
The machine never checks what you already own, so duplicates are common and completing the collection takes far longer than the pool size suggests. On average it should take about 6,887 coins to unlock every title in the pool, and around 9,062 coins to win all 24 plushies.