Yellow Lantern

History

Prior to Crisis on Infinite Earths, the Bizarro-Hal Jordan got a Lantern ring and Green Lantern battery from Bizarro, but Bizarro gave him a yellow lantern ring. So after 24 hours,  Bizarro-Hal became powerless (because the Bizarro-Yellow ring was powerless against green). Bizarro offered to craft a Yellow Lantern battery. But Bizarro-Hal refused because if (in Bizarro logic) the Green Lanterns are fearless, a Yellow Lantern has to be fearful and easily scared by anything. He also believed (based on Bizarro logic) being the most easily scare being in the universe makes the most courageous person on the Bizarro World due to their obsession with being backwards.
Afer Crisis on Infinite Earths, Bizarro III used his replicating powers to create Bizarro versions of Earth people and a world for them to live on. Among these imperfect duplicates was the Bizarro Green Lantern a.k.a. the Yellow Lantern. He was a member of the Bizarro Justice League and helped them stop Bizarro Doomsday. The Sinestro Corp ordered him away thus saving him from the destruction of the Bizarro World. Yellow Lantern was among the Sinestro Corp. agents that attacked Coast City.

Powers

The pre-Crisis on Infinite Earths version of the Yellow Lantern had different powers than a post-Crisis counterpart. He had a Yellow Lantern ring that works like a Green Lantern ring, but ineffective toward the color Green. Since his battery was green, he was powerless.
Post-Crisis, he also had a Sinestro Lantern ring. However, this one worked since he had a proper power battery. Unlike most Sinestro rings, he cannot affect things colored green.

References:
http://en.wikipedia.org/wiki/Yellow_Lantern (The content was removed)
http://greenlantern.wikia.com/wiki/Yellow_Lantern
http://en.wikipedia.org/wiki/Bizarro_League
http://www.comicvine.com/yellow-lantern/4005-47971/
http://images3.wikia.nocookie.net/__cb20090805210812/greenlantern/images/7/71/Yellow_Lantern.jpg