 If you liked GetBackers |  ...then you might like Shonan Junai Gumi! |
Young GTO (Shonan Junai Gumi) is very similar to Get Backers in that they both feature a duo. In Shonan Junai Gumi , Eikichi Onizuka and Danma Ryuji(Onibaku) both try to find girlfriends and become the strongest gang in Shonan.In Getbackers ,Ginji Amano and Ban Mido try and make a living in becoming retrievers, by helping people "get back" what they've lost. Both animes feature a group of two characters who fight alongside each other against tough opponents and have hilarious moments together. Hope you enjoy them! =) GBbaku - geddit? :P