If you're talking about the online Pokemon wiki-encyclopedia (http://bulbapedia.bulbagarden.net/wiki/Main_Page) then yes, that's free to use.
I can't get into Bulbapedia either. From what I've heard, Bulbapedia is down for maintenance. Pray maintenance ends soon.
Actully, I just was using Bulbapedia when I came across, "Bulbapedia has a problem". Something happened to the server. Maybe it was ph34r.
Easy, type Bulbapedia on google and tada, you will see at the top of the page!
Bulbapedia has not closed, and will likely not close in the forseeable future. Bulbapedia has been experiencing some significant technical problems as of late, but they will be taken care of soon. Bulbapedia experienced a series of vandal attacks during the time which this question was posted. They shut the site down temporarily for cleanup. For more info, please don't hesitate to ask TTEchidna, Bulbapedia Mod.
bulbapedia
No it does not cost money.
No it does not cost money
Bulbapedia!
No it does not cost money
Yes it do cost money
It depends on which version you get there is a way for it to cost money. But it is most likely to tell you whether it will cost money or not! :)
You can search in images.google.com or try Pokecharms. Maybe even Bulbapedia. I don't use Bulbapedia that much, I try to find out for myself. Happy Hunting!