A guide on how to get all achievements in Touhou Blooming Chaos 2.
Playing for the first time
Leveling up characters
Every time you defeat Aya, she drops a piece of film. Take it to Hatate in the Gallery and give her the film, at the cost of 1 Gold coin.
Bring all of the required enemy and boss coins for each character in the Heroes room.
Answer the TBC1-related questions from the slot machine in the Heroes room. Answer guide here.
Bring all five rarities of each outfit belonging to each girl to the Equipment room. Optimal guide here.
Defeating secret bosses
It is recommended to level up a strong character (like Yuuka or Reimu) and set up a macro to make them attack the dummy overnight, since it has 100,000,000 HP.