Pinkamena Dianne Pie

Of course. Blender files, which are fun to make btw, are self made files, which fits with the restrictions of Octavia's hall. One thing though however, is that it should be of your work, and not someone else's. The "Generator" to which that it is speaking to is General Zoi's "Pony Maker", which is extremely over used and anyone could make one. Hope this helps.

You really can't essentially change it yourself. The badge is basically a representation of the number of active posts you have made, changing to higher ranks as your post count increases. I.E. It'll change to a cupcake when you reach 50, parasprite at 100, and so on. So, if you want it to change, just keep being active on the forums and partake in it's many areas. Hope this helps.