How to get eternal flower floette??

Hi all,

I downloaded the new English release of Pokémon Z by Ericlostie. I wanted to play the entire game again from the start to refresh my memory, and downloaded and played through the version 1.55 update and started a new save file. How do I get the eternal flower floette?? As on the previous version, you get it after the Carriage event with Mirra, but this time I haven't got it??? Please help, would love to play through the game with it.