spectrier and glastrier are allowed in ranked battles, calyrex + rider forms are not
Source
Oh, and:
Banned Pokémon No. Pic Name Type #150
Mewtwo
Mew
Lugia
Ho-Oh
Celebi
Kyogre
Groudon
Rayquaza
Jirachi
Dialga
Palkia
Victini
Giratina
Reshiram
Zekrom
Kyurem
Keldeo
Genesect
Xerneas
Yveltal
Zygarde
Diancie
Volcanion
Cosmog
Cosmoem
Solgaleo
Lunala
Necrozma
Magearna
Marshadow
Zeraora
Meltan
Melmetal
Zacian
Zamazenta
Eternatus
Zarude
Calyrex
Source
Apparently Calyrex + its forms aren't, but Glastrier and Spectrier are allowed.
Hope this helps! :)
