Board Thread:Dark Souls/@comment-99.156.80.33-20140709170441/@comment-4511886-20160624131546

The (blue) golem that drops the Pendant has always been there, even before the DLC patch was released. It is one of the first enemies encountered in the area, as it is found before even the first Channeler. It will only drop the Pendant after you save Dusk in Darkroot Basin, but you do not need to summon her.

Ascension to Manus' Catalyst is only used to confirm that you have the patch with the DLC's content.

Files created before you got the DLC must enter the next NG cycle (done by beating the game) to access it. It's almost definitely easier to just create a new character if this happens.