Sorry for the necro, but I just wanted to say that I finally found it. :)
Apparently, this is a variant Fighter class who has the following changes:
He does not receive Fighter bonus feats at 2nd and 6th levels.
Instead, at 2nd level, he receives a +2 to his AC and saves when attacked by traps and a +5 bonus to his Strength when breaking a door wall or similar obstacle. When Bull Rushing someone into a wall or obstacle, he deals 4d6 damage plus twice his Strength bonus due to the momentum.
At 6th level, the above advantages are improved to +4 bonus to AC and Saves when attacked by traps, a +10 bonus to Strength when breaking doors and walls and 8d6 damage plus three times his Strength bonus when Bull Rushing people into walls.
The reason I asked was because I saw the variant mentioned
here, and I got curious. Apparently, the Dungeoncrasher was rated (slightly) more highly than the regular Fighter, and I wondered whether it was worth using. Looking at it now, its power seems rather situational (though granted these abilities are way more powerful than a couple of feats) - I don't really use traps that much. However, the breaking doors and Bull Rush seems nifty.
