Say I'm playing a hypothetical Doubles match.
Opponent's Pokémon: My Pokémon:
Heatran uses Heat Wave, and Aegislash blocks it with Wide Guard. But I anticipate this and use Feint with Sableye. However, Feint will not affect Aegislash because it is a Ghost-type. So I use Feint on Dustox instead.
Feint and Shadow Force lift the effect of Wide Guard when successfully used on an opponent's team.
And as of Gen 6
Feint and Shadow Force now lift the effect of Wide Guard from all allies, if they hit an ally.
Here's bulbapedia's link.
There you go dude, hope this helps!
As of Generation 5, Feint is able to lift the effects of Wide Guard.
Source