I, for one, really enjoyed this chapter. I'd been hungry for some plot exposition in relation to the legendaries for quite some time - especially Spirit and Gyarados. It was really nice to see the Chosen aspect finally explained in full.
I've also always enjoyed seeing Spirit, since May used to be so connected to her but they have entirely different ideals now. Although I didn't see immediately how Entei ignored Spirit, upon seeing your comment I went back and reread the chapter, and that too was interesting. Especially intriguing was the point at which Entei went into Spirit's necklace - he was thinking of her merely as a hideaway - a deposit box, if you will. And she didn't get that all it seemed, she was just in her usual reverential awe.
I also really felt bad for Gyarados in this chapter. He had a really harsh life, and it was only for Suicune's benefit - along with the revelation that the legendaries are in fact not deities, his whole life has been miserable just for this one strong creature. And Spirit's life hasn't been as harsh, but her situation is the same as Gyarados's essentially, but I think her naivete has changed her perception. All in all, I really enjoyed all the plot of this chapter. True, it was fast paced, but it was a nice interruption of the league, and it added to Mark's off-balance feeling he's been having. I've always really enjoyed the plot of TQftL, a lot of the time more than the battles.
Seeing Fury's book was also great. He's really amusing at times.