Meh I disliked Spear Pillar. Balanced Pillar is way better due to no freaking legendaries tossing toenail clippings at me or reversing my controls. The best Pokemon interaction is the one at Saffron City
To me, Spear Pillar is only fun if Dialga is out. Cresselia's "toe nail clippings" usually interrupts a fight between me and an opponent and Palkia seems to like to flip the controls while I'm trying to recover.