Gravitation Falls  Vorgeschlagen von Sneggleblech 
Joe  Vorgeschlagen von InsidersGameplay 
Gravity Falls  Vorgeschlagen von KateTheGoodGirl300 
Poplar  Vorgeschlagen von LeoBloxyDonut 

There are letters from different fonts:
A - Gill Sans MT Extra Bold (needs editing in Photoshop)
B - Tondu Beta
C - Crocante
D - Crocante
E - Tondu Beta
F - Luckiest Guy
G - Crocante
H - Molot or Tondu Beta
I - Tondu Beta
J - Crocante
K - Crcante
L - Luckiest Guy
M - Tondu Beta
N - Crocante
O - Crocante
P - Crocante
Q - Crocante
R - Crocante
S - Something like Bauhaus. It is a very complicated ”S”. I recommend ”Luckiest Guy” for it, after that edit its angle in Photoshop with Edit > Transform (on the menu of the top)
T - Tondu Beta
U - Gill Sans MT Extra Bold
V - Gill Sans MT Extra Bold
W - Tondu Beta
X - Tondu Beta
Y - Gill Sans MT Extra Bold
Z - Tondu Beta

Almost all of these fonts should be edited in Photoshop with that option. I f you were asking about the font from "CREATED BY" label, the answer is MV Boli. "ALEX HIRSCH" label was wrote with Old Press or Wrong Time Wrong Place font. For the fill and the title card of the logo you can search www.arberlezi.deviantart.com and you will find both. If you were asking for the font from http://www.gravi-teamfalls.tumblr.com/ logo, the font is Sforzando Alto. The "Disney" label was added with a creamy-white with Waltograph font.

Download/purchasing links:

https://www.myfonts.com/fonts/pintassilgo/crocante/ - Crocante (PAY)
http://www.dafont.com/tondu.font - Tondu Beta (FREE)
http://www.1001fonts.com/luckiest-guy-font.html - Luckiest Guy (FREE)
http://www.dafont.com/molot.font - Molot (FREE)
http://myfonts.us/td-1W4ALp - Gill Sans MT Extra Bold (PAY)
http://www.dafont.com/walt-disney.font - Waltograph (FREE)
https://www.myfonts.com/fonts/pintassilgo/sforzando/ - Sforzando Alto (PAY) ~ For the logo from http://www.gravi-teamfalls.tumblr.com/ .

The angle of the logo can be easy imitated. It is 31°, -31° and 1 for a straight angle. You can obviously edit its angle. The eroded part from the letters is just an eroded grunge. You can find it on Google. The text has an extrusion of 95pt. The inner glow is a creamy-white. The colors can be added very easily and the orange from the other sides of the extrusion is on the pallette so you can use it. The rest of the extrusion is pure black.

But if you can't edit the letters, just write them. I mean, the logo can be hand-drawn. Draw them, scan them, illustrate in Adobe Illustrator with Trace Image and Gaussian Blur, make them, design them, make an .EOT/ .TTF/ .OTF files with letters and you'r ready. So you shouldn't work hard with finding a font. You can make it, if you dont't find it.

I need that crocante font, like yesterday. pls n thnx

Try Gravitation Falls.

"CREATED BY" is not MV Boli. I found a font that looks exactly like it.
I'm not sure if you can download it from other websites but this was the closest source I could find.

This one is from OfficialLyrics(WestralInc).
I found it in Fontmeme instead of DeviantArt is because I can't visit Westral's profile anymore.

That's the one I already linked to.