No need to overreact, Ramsoomair mocks every game and every platform whenever they give him any inspiration.
Even the harshest strips he made against Ninty were about policies, and not HW or SW themselves, and it was still milder than his rabid strip about Final Fantasy XIII, just to make an example. And this very strip, like many others, shows he's a big Pokémon fan, he really knows them and likes to use them to build gags, choosing each time the most appropriate as he'd choose the best word, in this case Rotom was perfect to revamp the old dust collecting joke.
Hey, I'm not a Pokémon fan, I just like Pikachu and a few others and that's all, but he makes me like them! (Except Ash Ketchum, not even he could make me like him ). And painting Mario even more perverted than Master Roshi makes me ROTFL.

Got the WiiU to try and play 3d world and returned it a couple of days after.It wasn't appropriete to have in a living room in our house

VG Cats?

For a second I thought you misspelled VGChartz. :P

Understandable: it's a well guarded secret, known only by a select few, that ioi actually is a cat.

.............Everything makes perfect sense right now!

After that Rotom strip, a Mewtwo and Greninja one, and today an Animal Crossing one http://www.vgcats.com/comics/?strip_id=335 (as the one before Rotom's one was http://www.vgcats.com/comics/?strip_id=333 ). He obviously plays a lot of Ninty games, and Pokémon ones are amongst those on top of his list.

Can u pls tell me the joke, i dont see it

Really you don't? At first neither did I, not playing Pokémon I had no idea, maybe, I don't remember, I guessed it could be a Pokémon, as there was a Ninty console, I googled a description of it and what it did (possessing the fridge) and amongst a lot of irrelevant results, I found it. 
Anyhow, Rotom (a Pokémon) possesses a fridge to pull a prank on Leo the VG Cat, then it has the bad idea of possessing a Wii U and ends up like it, forsaken and forgotten, sadly collecting dust on a shelf. The old and trite dust ccollecting joke made funny again thanks to creativity.  Obviously a big part of the fun are the people taking it far too seriosly and getting all riled up.   

It's honestly really funny to those who have some sadistic malice towards Nintendo (which encompasses the majority of his site, as I have so far experienced and witnessed).

Otheriwse, it's just another repetitive joke you shouldn't pay too much attention to and move along.

In other cases maybe, but VG Cats author is clearly a fan of most Ninty franchises (and of all the most important games on the other platforms too). This doesn't prevent him from joking on them or even trolling them, but he knows too much about them for not playing them a lot.