No, a few months ago Smogon merged BL into UU, but moved Empoleon and Flygon into OU. Then, they did testing on it and most voted for Abomasnow, Froslass, Gallade, Raikou, and Staraptor to leave UU and go to BL for being too strong for the UU environment. BL is mearly a banned tier for UU, kind of like Ubers to OU. So now Arcanine is in UU, he can start sweeping like crazy! =3 They also made the NU tier again based on usage in UU. UU link (click).