Nope. See, Pokémon is a franchise that lasts upon that popularity of the two games released every three-five years or so, and then it grows an immediate structure. The anime that follows the same world of the game with the old characters that will never ever evolve, a few spinoff games, the community...
Now, I can't see the community giving up on their thing. Heck, I couldn't see this community disappear from the map if there were no Megaman games for ten years because you guys are just too damn stubborn.
But it is not a franchise that can evolve and bend as much as Mario. Pokémon are probably the one franchise that Nintendo just doesn't evolve at all (no, new features and 3D environments don't count, talking about the main game) and sooner or later, it'll reach a point where it either evolves, is whored out beyond belief, or people get tired of it to go to the next new thing. You know, kinda like what's happening to Final Fantasy right now. Still popular, but it's slowly descending.
While Mario? I don't doubt that there might be hiatuses in the future, probably when Miyamoto dies and the character goes into the Mickey Mouse territory of irrelevance-but-still-symbolic, but I certainly don't doubt that Nintendo will keep pumping out great Mario games for a looooong time, and through different kinds of interests and likings.
Yep. Pokemon hasn't evolved yet because Pokemon doesn't need to evolve yet. The core 2 games still are extremely high sellers, despite essentially being the same game repackaged, just with a different battle system, newer Pokemon, and slightly newer graphics. The primary story is still the same. The primary goal is still the same. Since Red & Blue, not much has changed, and alot of the gaming generation that has grown up with it still play it, and are now passing it on to their children, their nephews & nieces, and so on, because they know first hand it's a game that they'll enjoy and can play. Hell, they've even literally made remakes of Red & Blue and recently Gold & Silver, and people bought it like crazy. The remakes sell more than most games do nowadays.
Plus, unlike Final Fantasy, Pokemon is not based around the story. Final Fantasy now has competition when it comes to its "grand story telling" genre with companies like Rockstar, Bioware, and so on. Plus the gameplay is overall different, so you can find one you like better. Pokemon has literally ZERO competition when it comes what the game offers overall. And whereas Final Fantasy and games of the like eventually end, Pokemon continues on. You can level up your favorites to 100. You can constantly battle with friends, building so many new team combinations. And the main thing is, you can continue to transfer your data, your Pokemon, over to the next game, in order to continue the trademarked process of catching them all.
Also, the anime doesn't need to evolve, cause it has only ONE purpose: to sell the franchise, both in terms of the game, the plushies, the figures, the card game, etc. It's no different than the Transformers or G.I. Joe cartoons from back in the day, except it's lasted much much longer, and continuously pumps out season after season, movie after movie, and is kiddish enough to never get taken off the air due to "extreme violence" or other such BS. It also has a trading card game which, despite the strength of both Magic & YuGiOh, is still played to this day. In fact, at PAX I saw they are putting their trading card game online now.
There's still so much more they can do with the brand too. They can make more console based Pokemon games like the 2 on the GameCube. They can put out a new Pokemon Stadium game on the Wii and watch that fly off the shelf. The 3rd gen will probably have a 3DS remake on the way sooner or later. ShinyRuby & SparklingEmerald, or something like that, and it will make millions. Hell, all Nintendo would have to do if they want to break the bank wide open is make a Pokemon MMO. It'd make billions. All without really having to change the basic, million dollar making formula.
Pokemon will last as long as Mario because it offers the key main ingredient Mario does: it appeals to all ages. Your basic Mario game is easy to learn and is a great starting point for the younger gamer getting into an adventure type game. Not to mention all the fun sports games, Mario Party games, Mario Kart, and other such genres & games with the plumbers' beloved face on it. Plus, like with New Super Mario Bros Wii & the other genres I mentioned, it is a game that can be played with all members of the family, from the youngins getting into it to the parents & adults who have grown up with it and still play it. Pokemon, in that regard, is no different. The older generation of Pokefans are now breeding as well, or have nieces and nephews, and their younger generation can easily jump into the Pokemon world, especially with the Saturday Morning Cartoon telling them they've gotta catch em' all constantly, with their school friends playing it, their aunts & uncles, and even possibly their parents. And unlike when the original GB games came out, there is now better online communities you can go to, to meet new trainers, to talk with people about your favorites, to battle them, and so on. Pokemon is built not just around the core 2 games that come out, but around the community that plays it. It's clearly built upon meeting with other trainers and playing them. I've seen it at every PAX I've been too. I see it on RPM. And I see zero signs of it ever stopping.