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The simple fact that SR is available for Assist will fuck you over in the long run.
Dig is shit simply because Earthquake ignores it. EQ is pretty common, so once the enemy realizes what you're doing you get fucked.
Fly isn't perfect accuracy, that will fuck you over in the long run as well. It also gets hit by Thunder, Hurricane and things with No Guard (Machamp/DW Golurk)
Focus Sash Riolu gets fucked over by Sandstorm/Hail.
All in all this team can be countered pretty easily, but you might be able to ruse some peeps with it on Showdown.