Rated Battles : Deoxys?

Question

I was playing rated battles recently and I had Deoxys-A and it would not let me use it
So I was wondering can you use Deoxys Formes in Rated Battles

Answer 1

Nope Deoxys is banned from Rated Battles.
Source Experience

Answer 2

Deoxys-A is and Deoxys normal form is banned from online battles.

All these Pokemon are banned from online battles:

Mewtwo
Xerneas
Yveltal
Arceus
Blaziken
Darkrai
Deoxys
Deoxys-A
Dialga
Giratina
Giratina-O
Groudon
Ho-Oh
Kyogre
Kyurem-W
Lugia
Palkia
Rayquaza
Reshiram
Shaymin-S
Zekrom

Source: Arqade.

Hope I helped!

Answer 3

You cannot.
Deoxys-A and Standard Deoxys are banned and are Uber. The other forms are not banned.