In 2010, the Nippon Professional Baseball league's Orix Buffaloes replaced their ball playing kid mascots Neppie and Ripsea with a pair of anthromorphic cattle named Buffalo Bull and Buffalo Bell. The pink, moe latter proved quite popular, tripling the sales of team goods, shooting up the pixiv popularity charts, and now, starring in her own photo book. That 80 page Buffalo Bell Official Photo Book goes on sale in Japan October 27th for 1,155yen.
And, if you're wondering what the less popular associates look like...
Bell's sibling Bull
And the put out to pasture Neppie and Ripsea