So I figure we have another thread for this somewhere but I couldn't find it
Get your halloween costumes before they expire on sunday:
http://www.ign.com/boards/threads/borderlands-2-halloween-skin-shift-codes.452729673/Unlock Salvador the Gunzerker's spooky "Killer Bee"
PC SHiFT Code: CTK3J-9XH3W-CRB3J-33TBJ-9JJHW
Xbox 360 SHiFT Code: WTK33-HFR95-RZRJX-KRBB3-CZ3KF
PlayStation 3 SHiFT Code: C3W3B-5JX5J-3C55J-ZJWTJ-RH3HR
Unlock Axton's spooky "Yellowjacket" customization
PC SHiFT Code: KT53J-36HBK-W6JJ3-BJJB3-WH95H
Xbox 360 SHiFT Code: KBKBT-WH6Z5-X96B6-WX3TJ-5J6J3
PlayStation 3 SHiFT Code: CJ5T3-5H5KT-3KCKT-9JKBB-3SKHT
Unlock Zer0’s spooky "Hornet's Nest" customization
PC SHiFT Code: 5J5JB-B9S35-W6J33-3BJBT-33JSF
Xbox 360 SHiFT Code: 5J53B-J96HW-F9FBX-CFTT3-FTFXS
PlayStation 3 SHiFT Code: KBKB3-J3R5J-BKCKT-H3W33-9F56C
Maya the Siren's spooky "Fright of the Bumblebee"
PC SHiFT Code: WTKBJ-XRHTW-C63BT-JTB33-J6C9T
Xbox 360 SHiFT Code: WJC3T-SS6S5-X9FTF-WRTB3-BT39H
PlayStation 3 SHiFT Code: KTCTJ-ZHCKB-BKKW3-STCJT-3FZTW
Unlock the Mechromancer's spooky "Stinger Missile"
PC SHiFT Code: W3WBJ-C6ZB5-C6JJT-33JJB-JSFX6
Xbox 360 SHiFT Code: WTKTJ-696S5-R9RB6-5RTT3-BTS3H
PlayStation 3 SHiFT Code: CJWTB-FZK5T-TKKWT-ZJ5B3-X56B9