Bulbapedia is nice when you want everything, which I actually often do for some of my projects. I do need to know what its based off of. I do need to know what it learned in every generation. I occasionally even need to know the anime bullshit. Like, for most people, Bulbapedia should not be your first source. However, it has its place. For example, I am currently making a giant Google doc on the ecology of the Alola region. Wouldn't it be nice if a site had a section on biology? Oh wait, Bulbapedia has that.