Okay, so I love this song and I couldn't find any tab for the whole song, so I tried to 
do it myself.
It's my first tab ever, all by ear, so I don't know if it is 100% right but it sounds 
okay to me.

Frank Iero's part. Based on studio version and Jimmy Fallon live performance.

UPDATE: I fixed the chorus (thanks guys), and the post-chorus. Closer to the way 
it's actually played.

Intro:
e|--------------------------------|---------------------------------|
B|--------------------------------|---------------------------------|
G|--------------------------------|---------------------------------|
D|--------------------------------|---------------------------------|
A|--------------------------------|------------------------5-7-5----|
E|-5h7-7-7-7-7-5h7-7-7-7-7-5h7-7-7|-5h7-7-7-7-7-5h7-7-7-7-7------7-5|

Verse 1:
e|--------------------------------|---------------------------------|
B|--------------------------------|---------------------------------|
G|--------------------------------|---------------------------------|
D|--------------------------------|---------------------------------| x2
A|--------------------------------|------------------------5-7-5----|
E|-5h7-7-7-7-7-5h7-7-7-7-7-5h7-7-7|-5h7-7-7-7-7-5h7-7-7-7-7------7-5|

Then:
e|-------------------------------|-------------------------------|
B|-------------------------------|-------------------------------|
G|---------------------7-9-7-----|---------------------7-9-7-----|
D|-7h9-9-9-9-9-7h9-9-9-------9-7-|-7h9-9-9-9-9-7h9-9-9-------9-7-|
A|-------------------------------|-------------------------------|
E|-------------------------------|-------------------------------|

e|---------------------------------|----------------------------------------------|
B|---------------------------------|-----------------10h12-12-12-12-10h12-12-12-12|
G|---------------------------------|-9h11-11-11-11-11-----------------------------|
D|-7h9-9-9-9-9-7h9-9-9-9-9-7h9-9-9-|----------------------------------------------|
A|---------------------------------|----------------------------------------------|
E|---------------------------------|----------------------------------------------|

Chorus:
e|-----------------------------------|--------------------------------------|
B|------------------6-xx-6-xx-6-xx-6-|-7-xx-7-xx-7-xx-7--9-xx-9-xx-11-xx-11-|
G|------------------6-xx-6-xx-6-xx-6-|-7-xx-7-xx-7-xx-7--9-xx-9-xx-11-xx-11-|
D|-9-xx-9-xx-9-xx-9-4-xx-4-xx-4-xx-4-|-5-xx-5-xx-5-xx-5--7-xx-7-xx--9-xx--9-|
A|-9-xx-9-xx-9-xx-9------------------|--------------------------------------|
E|-7-xx-7-xx-7-xx-7------------------|--------------------------------------|

Then:
e|-----------------------10-9-|-------------------------|
B|---12--9-12-9--12-----------|---12--9-12-9--12--------|
G|-11--11------12--12-11------|-11--11------12--12-11~~-|
D|----------------------------|-------------------------|
A|----------------------------|-------------------------|
E|----------------------------|-------------------------|

Post-chorus without guitar except that little thingy just before the verse.

e|---------|
B|---------|
G|---4br---|
D|---------|
A|---------|
E|---------|

Verse 2:
e|--------------------------------|---------------------------------|
B|--------------------------------|---------------------------------|
G|--------------------------------|---------------------------------|
D|--------------------------------|---------------------------------| x2
A|--------------------------------|------------------------5-7-5----|
E|-5h7-7-7-7-7-5h7-7-7-7-7-5h7-7-7|-5h7-7-7-7-7-5h7-7-7-7-7------7-5|

Then it goes like:
e|-5------------------------------------|-5--------------------|
B|---3-5--------------------------------|---3-5-7-5-3-5-3------|
G|-------4~~-4-4/7------------6^(7)r6p4-|-----------------6-4~-|
D|-----------------7~-7-6-7-6----------7|----------------------|
A|--------------------------------------|----------------------|
E|--------------------------------------|----------------------|

Chorus 2:
e|-----------------------------------|--------------------------------------|
B|------------------4-xx-4-xx-4-xx-4-|-5-xx-5-xx-5-xx-7--7-xx-7-xx--9-xx--9-|
G|------------------6-xx-6-xx-6-xx-6-|-7-xx-7-xx-7-xx-7--9-xx-9-xx-11-xx-11-|
D|-7-xx-7-xx-7-xx-7-6-xx-6-xx-6-xx-6-|-7-xx-7-xx-7-xx-7--9-xx-9-xx-11-xx-11-|
A|-9-xx-9-xx-9-xx-9------------------|--------------------------------------|
E|-9-xx-9-xx-9-xx-9------------------|--------------------------------------|

Then (a little different at the end):
e|-----------------------10-9-|----------------------10h12p10/9-10-9---|
B|---12--9-12-9--12-----------|---12--9-12-9--12--------------------12-|
G|-11--11------12--12-11------|-11--11------12--12-11------------------|
D|----------------------------|----------------------------------------|
A|----------------------------|----------------------------------------|
E|----------------------------|----------------------------------------|

Post-Chorus:
e|----------------------------------|-----------------------------------|
B|----------------------------------|-----------------------------------|
G|-11-14-16--11-14-16--11-14-16-----|-----------------------------------|
D|-x--x--x---x--x--x---x--x--x---x2-|-14^(16)-14^(16)-12-11 12p11-------|
A|-9--12-14--9--12-14--9--12-14-----|-----------------------------14-12-|
E|----------------------------------|-----------------------------------|

e|----------------------------------|
B|----------------------------------|
G|-11-14-16--11-14-16--11-14-16-----|
D|-x--x--x---x--x--x---x--x--x---x2-|
A|-9--12-14--9--12-14--9--12-14-----|
E|----------------------------------|


Bridge without guitar, but I like to play this several times when the drums start 
playing again.

e|----------------------------------|
B|----------------------------------|
G|----------------------------------|
D|----------------------------------|
A|----------------------------5-7-5-|
E|-5h7p5h7p5h7p5h7p5h7p5h7p5h-------|

Then the little solo thingy before the last chorus:

e|-12^(14)r12-10-10-12-------|
B|-----------------------12~-|
G|---------------------------|
D|---------------------------|
A|---------------------------|
E|---------------------------|

Play Chorus again and Pre-chorus several times.

Outro:

e|-0---0---0------------|------------------------------|
B|--0---0---0-----------|------------------------------|
G|---0---0---0----0-----|-----0-----0-----0-----0--4~~-|
D|------------0-4----x3-|-0-4---0-4---0-4---0-4----2~~-|
A|----------------------|------------------------------|
E|----------------------|------------------------------|

Enjoy! Please rate and comment :)