Tiberious

Can confirm that 050B10 is the start of the Festival Plaza facility information. There is also information relating to whether or not you got the facility from another person, and if so, who.

XX YY TT TT NN NN NN NN NN NN NN NN NN NN NN NN
NN NN NN NN NN NN NN NN NN NN NN NN 00 00 00 00
00 00 00 00 00 00 00 00 FF FF FF FF 00 00 00 00
ZZ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00

The green TT is either 01 00 for obtained from a Visitor, or 00 00 for self-obtained.

The brown NN field is for the name of the trainer who gave it to you, in reversed Unicode format. For example, if a trainer named Editor gave you a facility, it would read:

XX YY TT TT 45 00 64 00 69 00 74 00 6F 00 72 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

I included space enough for 12 letters in my notes above (to fit with Pokémon names), but if trainers can use more, well, there's enough space there to hold the whole thing.

Would it be possible to somehow 'pre-patch' Y to v1.5 before randomizing? I'd rather not have to deal with the game-breaking v1.0 bugs.