Twenty years later and it's still kicking as strong as it was a new IP. It sells twice/three times all other games non-Mario related(Animal Crossing aside) in the 3DS.

In DS and GB era I thought it was that huge userbase, but in the 3DS is the same story all over again, OR/AS are dominating the chartz, and they are just a remake.

What makes us buy the same game over and over again for that long without any major innovation(just overhauls to typing/battle)? 

It's like COD. But better. :) Cod repeats the same shit, still sells like a beast.

Well it does have more marketing and exposure than any other video game series. It has its own tv show, toys, card games, movies, and more. It also has a whole company dedicated to the IP's success. With all of those advantages, it's kind of expected for Pokemon to sell a lot. Its too bad Nintendo doesn't treat its other gaming IPs like Pokemon to generate more revenue that could be used in video games.

It satisfies an itch that most other games don't. Seriously, it's a drug that just can't be quit.

Pokemon is their anti-drug.

Somethings cannot be explained.

Pokemon is like doing anal. First, you are kind of unsure of it and wonder why some people like it but after you do it, bam, you will never stop cuming back! Pokemon sells cause the games are fun and they manage to keep it "fresh" enough to not make them feel old for most people

It's just good, no need to 'improve' it, it would probably break.

You know. Pokemon isn't targeted at the same fanbase every year/gen (as in Pokemon gen, not console gen). It's kids mostly who buy Pokemon, and there will always be new kids to buy Pokemon.

That's because GameFreak and The Pokemon Company do all that merchandise, not Nintendo.