Among my favorite Pokemon in Trick Room in Gen IV. I don't see anything that's especially nerfed him this generation besides maybe the use of Flame Orb being a little more dangerous with battles a little more drawn out. The addition of two very potent Ghost-types, both of which are even better in Doubles, can use Trick Room, and resist Ice Punch (in addition to being immune to Close Combat, of course), might be another thing to keep in mind, and an argument for the use of a Rock-type move secondary to Ice Punch.
441 D/Cs and counting, baby!
*Contrary to popular belief, this is not a compendium of people who disconnect on Wi-Fi. See: Seinfeld, "The Comeback."