So

The viability rankings of OU, UU, RU and NU. Tier Shifts based on the viability rankings. Anything that's in their tier that's C+ or lower warrants a drop, but anything that's A- or higher that's not in their tier warrants a rise.

- - - - - - - - - - - - - - - -
 * Alakazam-Mega moved from BL to OU
 * Ambipom moved from RU to NU
 * Cinccino moved from RU to NU
 * Clawitzer moved from RU to NU
 * Cofgrigus moved from RU to NU
 * Cradily moved from NU to PU
 * Donphan moved from UU to RU
 * Eelektross moved from RU to NU
 * Floatzel moved from PU to NU
 * Golbat moved from RU to NU
 * Goodra moved from UU to RU
 * Haxorus moved from UU to RU BL2
 * Heracross-Mega moved from BL to OU
 * Hitmontop moved from RU to NU
 * Kecleon moved from NU to PU BL4
 * Klinklang moved from NU to PU
 * Latias-Mega moved from (OU) to OU
 * Muk moved from NU to PU
 * Sandslash moved from NU to PU
 * Sawk moved from BL3 to RU
 * Terrakion moved from BL to OU
 * Trevenant moved from RU to NU
 * Typhlosion moved from RU to NU BL3
 * Vaporeon moved from UU to RU
 * Zapdos moved from OU to UU