One Piece of Evidence of Primal Groudon's Centralization

What the Ubers Tier List currently looks like:

S

S+


 * Groudon-Primal

S


 * Arceus
 * Darkrai
 * Ho-Oh
 * Salamence-Mega
 * Xerneas

A

A+


 * Arceus-Water
 * Gengar-Mega
 * Giratina-Origin
 * Klefki

A


 * Arceus-Ghost
 * Arceus-Ground
 * Deoxys-Speed
 * Diancie-Mega
 * Latios
 * Lugia
 * Sableye-Mega

A-


 * Arceus-Dragon
 * Deoxys-Attack
 * Kyogre-Primal
 * Mewtwo
 * Rayquaza
 * Yveltal

B

B+


 * Arceus-Rock
 * Dialga
 * Excadrill
 * Kangaskhan-Mega
 * Landorus-Therian
 * Latias
 * Shaymin-Sky
 * Skarmory
 * Tyranitar

B


 * Aegislash
 * Blissey
 * Bronzong
 * Ferrothorn
 * Jirachi
 * Lucario-Mega
 * Mewtwo-Mega-X
 * Mewtwo-Mega-Y
 * Wobbuffet
 * Zekrom

B-


 * Arceus-Fairy
 * Arceus-Ice
 * Arceus-Dark
 * Blaziken
 * Cloyster
 * Greninja
 * Scolipede
 * Slowbro-Mega
 * Tyranitar-Mega

C

C+


 * Aerodactyl-Mega
 * Alomomola
 * Blaziken-Mega
 * Cresselia
 * Flygon
 * Giratina
 * Gothitelle
 * Scizor-Mega
 * Smeargle
 * Tentacruel

C


 * Arceus-Electric
 * Arceus-Fighting
 * Arceus-Grass
 * Arceus-Poison
 * Gyarados-Mega
 * Kyurem-White
 * Palkia

C-


 * Arceus-Steel
 * Ditto
 * Groudon
 * Landorus
 * Mawile-Mega

D


 * Arceus-Bug
 * Arceus-Fire
 * Arceus-Flying
 * Arceus-Psychic
 * Deoxys
 * Deoxys-Defense
 * Genesect
 * Hoopa-Unbound
 * Kyogre
 * Reshiram

What the Ubers Tier List would look like (approximately) if Primal Groudon didn't exist:

S


 * Arceus
 * Darkrai
 * Ho-Oh
 * Salamence-Mega
 * Xerneas

A

A+


 * Arceus-Water
 * Gengar-Mega
 * Giratina-Origin
 * Klefki
 * Lugia*

A


 * Arceus-Ghost
 * Arceus-Ground
 * Deoxys-Speed
 * Diancie-Mega
 * Latios
 * Sableye-Mega

A-


 * Arceus-Dragon
 * Arceus-Rock
 * Deoxys-Attack
 * Kyogre-Primal
 * Mewtwo
 * Rayquaza
 * Skarmory
 * Yveltal

B

B+


 * Aegislash
 * Blissey
 * Dialga
 * Excadrill
 * Kangaskhan-Mega
 * Landorus-Therian
 * Latias
 * Lucario-Mega
 * Mewtwo-Mega-X
 * Mewtwo-Mega-Y
 * Shaymin-Sky
 * Tyranitar

B


 * Bronzong
 * Ferrothorn
 * Jirachi
 * Wobbuffet
 * Zekrom

B-


 * Arceus-Fairy
 * Arceus-Ice
 * Arceus-Dark
 * Blaziken
 * Cloyster
 * Greninja
 * Groudon
 * Scolipede
 * Slowbro-Mega
 * Tyranitar-Mega

C

C+


 * Aerodactyl-Mega
 * Alomomola
 * Blaziken-Mega
 * Cresselia
 * Flygon
 * Giratina
 * Gothitelle
 * Gyarados-Mega
 * Mawile-Mega
 * Scizor-Mega
 * Smeargle
 * Tentacruel

C


 * Arceus-Electric
 * Arceus-Fighting
 * Arceus-Grass
 * Arceus-Poison
 * Kyurem-White
 * Palkia

C-


 * Arceus-Steel
 * Ditto
 * Landorus

D


 * Arceus-Bug
 * Arceus-Fire
 * Arceus-Flying
 * Arceus-Psychic
 * Deoxys
 * Deoxys-Defense
 * Genesect
 * Hoopa-Unbound
 * Kyogre
 * Reshiram

*  Viability isn't really affected by P-Don but I think it should rise anyway.

To everyone who mindlessly kisses Primal Groudon's ass: