Chessmons Viability Rankings
 
Open to changes (comment in the forums if you want a change!)
 
Rook:
S
Landorus-Therian

A+
Celesteela
Dugtrio
Tapu Koko
Tapu Lele

A
Gengar
Kartana
Kyurem-Black
Skarmory
 
A-
Clefable
Greninja-Ash
Keldeo
Latios
Magearna
 
B+
Bisharp
Chansey
Gliscor
Heatran
Magnezone
Mew
Jirachi
Thundurus
Thundurus-Therian
Zapdos
 
B
Breloom
Manaphy
Marowak-Alola
Diggersby
Hoopa-Unbound
Serperior
Tapu Bulu
Tornadus-Therian
Zygarde
 
B-
Azumarill
Excadrill
Ferrothorn
Garchomp
Greninja
Toxapex
Tyranitar
Victini
Volcarona
 
C+
Dragonite
Mimikyu
Nihilego
Rotom-Wash
Tangrowth
Tapu Fini
Staraptor
 
C
Hawlucha
Smeargle
 
C-
Alakazam
Pelipper