Abilities » Delta Evolution
Can I discard a Pokemon with the "Delta Evolution" Ancient Trait to evolve ANY Pokemon in play?
No, that's not how it works. You can only play the Pokemon with the Delta Evolution Ancient Trait on top of a Pokemon it can normally evolve from.
Source: Roaring Skies FAQ (2015-05-07), TPCi Rules Team (2015-05-07)

Relevant cards

Note: All applicable cards may not be listed below.
XY6_105
XY6_32
XY6_46
XY6_74
XY6_76
XY6_81
XYP_XY57
XYP_XY57
XYP_XY59
XYP_XY59