Still viable? Honey it never was viable in the first place. The problem is all it's damage is tied up in having status conditions which means you have to be able to apply multiple status conditions every turn consistently (because either you knock out the pokemon, or you don't and your opponent will probably remove those status conditions through evolution or retreating).
In expanded you have LaserBank and acceleration cards like Dark Patch that significantly help the deck be more functional but it still will have those same consistency issues.