The event is being held to coincide with Comic Relief's "Red Nose Day", which is kind of like Britain's version of the Jerry Lewis Labor Day Telethon, but with more comedians and novelty nosepieces. British readers, feel free to correct us.
Participants pay £1 to get into the tournament, and all of the proceeds go to the charity. We admire the DSMeetup group for wanting to do something positive with their DS gaming sessions; the most charitable thing our Game Nights here do are keep us from debilitating, painful loneliness. And even then, only for a few hours.