Anyone else spot a tiny bit of bias in this post?
Pokemon at its care does not support an MMO format. It would be cool to get to wonder around and battle enemies and other players Wizard 101 (despise this game) style. Collecting Pokemon is a very single-man endeavor. I have difficulty believing that Pokemon collection would be a very good multiplayer activity. Imagine going into a dungeon to collect a Rayquaza, but only one player comes out with that Rayquaza. You want it to be special so that not everyone has Rayquaza, but so that people aren't frustrated by not getting it.
Worries about casuals and hardcores in Pokemon mixing are nonsensical. THEY ALREADY DO! When I battle online, I can count just as many competitive opponents as I can count lame opponents. Kids are just fine playing MMOs... WoW (at a teen rating) has about 25% of its players at or under the age of 18. Now if you take away the teen rating and put Pokemon in that place, the market for children go up. Wizard 101 and Free Realms market themselves towards children exclusively... and those games do well. I can't imagine why a Pokemon MMO would be taboo'd by parents. Another BS point, my friends.
Once again, the reason that Pokemon would be a bad MMO is because of the Pokemon collection. About half of the fun of a Pokemon game would be a single-player experience in a multiplayer game. Part of the fun of an MMO is collecting gear in dungeons with other players. That just can't be done in a Pokemon MMO without major changes to the concept. The multiplayer battles would be cool, but that doesn't justify an MMO. It would be cool to do this type of battling in our games... maybe down the line.
NOW THEN, anyone who understands market trends will be able to agree that Pokemon will majorly lose popularity if not die within some period of the time. Pokemon has had a long life-span and it isn't going anywhere anytime soon. Like most franchises, it will eventually lose popularity due to some external reason. Perhaps Nintendo goes under... who knows? Sometime... eventually, Pokemon will lose popularity if not "die". The franchise has room to grow, but its games have not innovated for a while... they've only iterated. While that is good on a short term scale (CoD is a very successful franchise that iterates every year), Pokemon will need a major innovation sooner or later if it is to keep its massive audience.