Moonsault Body Press is an unblockable attack used by King I and King II from Tekken 2 onwards. King will face away from his opponent and then perform a backflip, landing on his opponent and pressing them into the ground.
As of Tekken 3, the move can also be performed facing backwards, in this case King simply backflips without having to turn around.
Armor King has an extra variation of this move Jump to Moonsault Body Press, where Armor King has to do a short hop before performing the move.
Prior to Tekken 5: Dark Resurrection, the attack did not have any unblockable "warnings".