How hard are they to make? - Habbo Hotel, Club Penguin, something like that? - how hard are they? ie, could someone do it on their own, or would they need a team?
Surely that would depend on your ability?
I imagine if you have a history in coding/game design/game creation its probably not that difficult.
If you are a qualified Dentist with zero pc skillz its going to be more of a challenge.
If you truly believe you have a good idea then approach an established company with the design/information. If its shit they will tell you to fuck off, if its not then winnar.
Im not sure you need a partner for that.
If you want to pay me 50k for suggesting the obvious however I could be available.
It depends on the game, you could make something pretty simple within a few days max.. that's if you had the experience.
But if you want to make quite a complicated game (2d or 3d) with little skills, try out Unity, it's free and I wouldn't be surprised if pretty much everyone was using it within a few years. Not to mention you can distribute unity games as an exe or a web application, much like you can with java based games. And I expect most mobile phones to have a unity player on quite soon
Just do what mobile phone game designers do and rip off classic old games like Sim Tower