Paul Barry, 38, of Pearse Street, Dublin 2, was charged with the manslaughter of 15-year-old Toyosi Shittabbey.
He has been remanded to Cloverhill Prison until 10.30am on Tuesday morning.
Michael Barry, 23, of Pigeonhouse Road, Dublin 4, was charged under Section 11 of the Firearms and Offensive Weapons Act with possession of a hockey stick.
He was released on bail on condition that he sign on at Irishtown Garda Station every day and surrender his passport and any other travel documents.
He has also been directed to stay away from the Tyrelstown area of Dublin.
The Nigerian Ambassador to Ireland, Dr Kemafo Nonyerem Chickwe, attended a memorial service for Toyosi in Tyrrelstown today.
She said she was encouraged by the overwhelming solidarity shown by all the nationalities in the community.
Around 300 people attended the memorial, which was held at Boulevard Mount Eustace, at the spot were Toyosi was stabbed.
Prayers were said by the Parish Pastor Dare Adetuberu, from the Kingdom Connections, Redeemed Christian Church of God.
A meeting is due to be held at Hartstown Community School at 1pm tomorrow to discuss the incident.
A candlelit vigil is also planned for tomorrow evening in Tyrrelstown.
