The Greatest Five
From the Castlevania Wiki, the Castlevania wiki
The strongest Dual Crash in Castlevania: Portrait of Ruin. It can only be obtained at the end of the Nest of Evil and it involves summoning the spirits of Leon, Richter, Juste, Simon and Trevor Belmont to attack. Here is an example http://www.gametrailers.com/player/16430.html
