This competition only allows single-type Pokémon to be used. Z-Moves are allowed, but Mega Stones are not.
This competition only allows the use of the Kalos Pokédex, and Mega Stones from ORAS can’t be used.
The third Online Competition has been revealed, and it seems to be pretty restrictive.
The first Online Competition in the Pokémon Global Link for Ultra Sun and Ultra Moon has been announced!
A new battle competition has been announced!
Those who participated in the Weakness Cup can collect four Mega Stones.
Use Pokémon smaller than a metre in height to wreck havoc! Meanwhile, if you participated in the last competition, you can claim your Hoenn Starters Mega Stones!
Big on battling? Get points for the World Championships in the 2017 International Challenge May!
It seems you can get Mega Stones without participating in online competitions! However, you may still want to sign up for the February competition – registration starts soon.
You can host competitions in Pokémon Sun and Moon, and try out rental teams in battle!