Amos and Andy
Jack and Wyatt
Bob and Dylan (ok this was just funny)
Cain and Able
Divit and Putter
Crimson and Clover
Kyoke and Nishibi (Japanese: sunrise and sunset)
Mac and Tosh (I like this one)
Smokey and Hardtack
Hlaoroo and Hazel
Kehaar and Blackavar