>>50817230The boosts to every stat other than Attack were too minimal to make a difference.
+5 to each bulk stat doesn't even begin to compare to the Eviolite boost, and +5 speed is actually a detriment because it's a Trick room mon.
And it doesn't even use its SpAtk.
So in practice, the only benefit it got was a +30 to its Attack. Which is definitely good, but barely matters because they're more supportmons than anything and 100 base Attack really isn't anything to write home about.
Add in the fact that it doesn't get a type change, doesn't get an ability change, and the three (3) new moves it gets are Focus Blast, Darkest Lariat, and Laser Focus (and it didn't even get the latter 2 until gen 8).
Dusknoir was fine in gen 4 when it was a tiny upgrade to Dusclops, but that tiny upgrade doesn't even begin to compare to Eviolite.