I can confrim for certain
Solid Rock Reduced Damage by 1/3. I tested by having both a Rhyperior and a Camerupt hit by a Max Sp. Atk Kyogre And Rain boosted Max health Water Spout, while Rhyperior and Camerupt (Both being 4x weak to Water) each had Light Screen and 3 stages of Sp. Def increase passed to them, a well as Max HP stats and a certain amount of Sp. Def each. Using a modifier of 1/3rds(Thus the Water spout is only 2.66x effective instead of 4x), I calculated that they would survive with very little HP, then proceed to take out the Kyogre with their own attacks, which the video showed. If Solid rock was 1/4th, the two would've been KO'd right there, and if it was 1/2, they would've had much more HP left. All other calculations I've ever made using 1/3 reduction have been completely accurate to what I see in battle. I can upload the vid to my youtube and post a link if you need to see it for yourselves. I can also post the damage calculation formula with the stats put in as well.Joe T.E. 01:47, 6 April 2009 (UTC)
It has to be one or the other
Bulbapedia says Solid Rock reduces super damage by 1/3. Serebii says by half. We should really find out which is which, I don't like seeing differences like this. A similar thing happened with Iron Fist. ~ToastypkFile:Trozeiani157.gif - Loom.File:Trozeiani286.gif 01:56, 17 April 2008 (UTC)
Palmer's Rhyperior.
When Rhyperior was hit by Grotle's Energy Ball, hit hardly did any damage, so is this Solid Rock activating in the Anime?
Trivia
I think there could be a trivia point that all Pokemon who can have this ability have at least one 4X weakness. I would add it myself anyway, except that adding trivia is forbidden right now due to B/W server load.--Jdthebud 02:23, 5 June 2011 (UTC)
Trivia
Shouldn't we have the 4x as a trivia and not at the top? ^^I^ rides camels… | love 'em. (T^LK) 02:00, 7 April 2012 (UTC)