Why is he wearing a diaper to begin with?

Because fetishfags.

Who is that wolf/fox thing?

^I'm guessing it's the artist's furfag self-insert.

How did this even become a thing to begin with? I see an uncomfortable amount of diaper fetish garbage in this fandom now and its just plain weird to say the least.

^It's a small niche thing that been there all long, you've only just noticed it now. Heck, just look at the upload date on this picture, it's from five years ago. In any case, there are almost 55,000 images on this booru, and out of all that, about 60 are diaper stuff, so unless there is some giant horde of GF diaper art that hasn't found it's way here, it's a minuscule amount.

Yep, that stings so much that the only thing to be doing was figure that the only good one can do is the same as one is.

Damn it or darn it.
Dipper! It really was all your fault!!
After everything Mabel and you had been through TOGETHER, you still haven't done THE ONE THING Mabel needed.
Your relationship with your sister has reached it theoretical max potential. You both need to move to the next natural level of familial bonding. Mabel's already your sister, she's already your best friend. Hell Dipper that is more than most siblings can claim. Your bond is supposed to be unbreakable, but there's still more you could have done to strengthen your relationship.
Dipper, family and friends, playing together and sharing, now, flirting and f... Oh who am I kidding! Sex! Dipper! Sex! She wanted IT and so should've you!
Right after Grunkle Stan borrowed your journal, you should have sat with Mabel and realized then that you almost lost her. That realization should have been the spark that ignited the flames of passionate incest, PINECEST.
Just like in a fanfic. I think I've made my point.

But seriously, I'm being totally serious right now. Don't judge me!

I hope this God awful show never comes back.

^if you hate it that much,then why are you here...?

As for myself I like to fondly remember season one and try to pretend season two never happened. I don't know what disappointed me more,the 1998 Godzilla when I was a little kid or Season two of GF.

She may not be potty trained, but at least she is PARTY trained!............I'll show myself out

Why would you draw Pacificia farting? You asshole!

Has anyone heard anything about this supposed new show or is it pretty much dead in the water?

I'm willing to bet 100 bucks its a macfarlane-esque sitcom.