The competition began on 24 August 2012 and ended on 20 October 2012 with the final, held at Shah Alam Stadium.
For the first time since 1994, a Singapore team took part in the competition under the name LIONSXII.
In this competition, the top 12 teams from 2012 Malaysia Super League is joined by the top 4 teams from 2012 Malaysia Premier League.
As part of the agreement between Football Association of Malaysia and Football Association of Singapore, a Singapore team will participate in Malaysia Cup.
Aggregate 2-2, ATM FA won penalty shoot-out 5–4.