//------------------------------//
// The Answer 16 
// Story: Life is a Test: A Series of Pony Logic Puzzles 
// by Brony_of_Brody 
//------------------------------//

Twilight needs to organise 12,186 matches.

In a tournament like this one, when one team loses they are out, so to produce one winner you'd need 12,186 matches to produce 12,186 losers.