I remember doing this a few times and only time I find its even possible to get it off is if they're stupid enough to be edgeguarding at the very edge. Launch into the grab just abit below the ledge and it'll actually catch them and drag them underneath the ledge. Similar to how Mewtwo's Disable could pull you under a ledge when returning to the stage in Melee.
*cough* you mean Confusion...
[/Mewtwo fanboyism]
I have a question - has anyone compiled a list of the Ganoncide's behaviour against each character? That is, those characters for whom the Ganoncide is a draw, is a victory, or a loss for Ganon?
I recall it depends on the size of the victim.
As for general merits of the move, there's definitely something to be said for its shock-producing (or morale-reducing) power. I've seen more than one match go against Ganon on the first stock, only to be impressed as the Ganon player wryly takes his ignorant/overconfident opponent down with him - completely nullifying the disparity.
...
I suppose the question is, is it better to try and go for an amazing pull from behind, hoping against hope that you'll take the foe from 20% to KO, yourself circa 100%? Or is it that, statistically, you should go for the cheat?
Disclaimer: To ward off flaming, I don't mean it's 'cheating' to use it. It's an expression.