I can legit confirm that Brontes spawns from EATING HQ food at the designated spots (chance to spawn from one of them) I just popped him the other day. I went to (x20,y27) (x22,y14) (x17,y13) (x18,y17) (x27,y21) (x22,y34) one of these spots, ate HQ deviled eggs, and he instantly popped right next to me. Update OP please