I never understood it and never used it and still don't understand it really. I just want to get Burmy and stuff, because I don't have any of th honey-tree exclusives. It seems like too much work and I would love a "for dummies" guide for it. I also rarely/never used the head butting trees either, I also thought it was too much work for me. and I would say that Heracross fitting into that tree... Who knows. Just another thing that makes no sense but happens anyway.