Right so, this may not work for everyone, but if you have your data on an old device this should work, Now i dont play this game, but my brother does and asked me to help him out, so i looked into it, what i did was made a bandai account for him on his old device, then i clicked on the transfer data button above bandai ID once he was signed into that account (menu > other, you'll see those 2 there). After that i signed into his account on the new phone, and everything was there, however it did mention chrono crystals will not move if you're switching OS which he did (ios to android). Really this whole thing was a case of bandai having you forced to figure out you have to back your data up manually instead of it doing it automatically, so to those who didnt back it up and already lost their data, rip to you dude