Harry's quidditch number is 7
You cannot join the Quidditch team on Pottermore.
Griffindore House Quidditch Team
There is only one Seeker on a Quidditch team.
The Bulgarian National Quidditch team
England's national team is called England. All countries national teams are called after the country.
He is the seeker on the Griffyindor quidditch team.
The Chudley Cannons!
The Holyhead Harpies.
It is called the Quaffle.