The universe is a big place filled with lots of alien races going about their day. Some of these races, like humans, have barely made it off their own planet while others, like the Thanagarians, are flying through space and mixing it up with the inhabitants of other planets. All of this was sure to create a need for an organization that could handle any disputes and keep the universe safe. That's why the Guardians of the Universe created the Green Lantern Corps.
While the comic tends to focus on the human Green Lanterns, you can be sure that there are a lot of weird characters in the Corps. These are the Lanterns who may never get their own series, or even show up all that often, but their wildness has left a mark on readers.
10 Mogo
Perhaps the best known of the stranger Green Lanterns, Mogo is more than your basic ring slinger. Created by Alan Moore and artist Dave Gibbons, Mogo is a sentient living planet that not only helps keep the universe safe as a Lantern but also serves as a training ground for rookie Green Lanterns.
As a living planet, Mogo is the largest Green Lantern, and it may be one of the oldest members of the Corps. Mogo, first introduced to readers in 1985, has survived a number of Crisis events and reboots, and considering the planet is a fan favorite, it will probably be around for years to come.
9 B’Ox
When fans think of alien lifeforms, they tend to imagine something humanoid, but probably with tentacles or other weird things. What most probably wouldn't think of is a rectangle, but that is exactly what B'Ox is. A large, three-dimensional box that has the abilities of a Green Lantern, B'Ox was first introduced to readers in 2006's Green Lantern Corps: Recharge by Dave Gibbons, Geoff Johns, and Patrick Gleason.
Aside from being named B'Ox and being a Green Lantern, not much is known about this hero. That includes not knowing what sector of the universe B'Ox patrols, but it served under Kilowog during the Sinestro Corps War. Fans also know that the Red Lantern Zox, who is a giant head, doesn't like the way B'Ox looks.
8 Leezle Pon
Another Alam Moore creation, Leezle Pon is a super-intelligent strain of the smallpox virus that patrols Sector 119 and is called in for cases that deal with biological missions that the other members of the Corps aren't able to investigate. Leezle Pon played an important part in the Siniestro Corp War, saving Guy Gardner's life when Guy was infected with Despotellis, Sinestro's own evil sentient virus.
For Leezle Pon, taking down Despotellis was a personal battle. It was Despotellis that killed Reemuz, Leezle Pon's partner. When she isn't on watch, Leezle Pon spends her time researching a permanent cure to Despotellis.
7 Ch'p
If ever there was a Green Lantern who deserved to be made into a stuffed animal, it's Ch'p. The Green Lantern of Sector 1014 who looks like a squirrel, Ch'p was a hero long before obtaining his ring. When the Crabster Army of Doctor Ub'x invaded Ch'p's home planet of H'lven, the future Green Lantern led the resistance against the evil army. It was the bravery he showed in war that put him on the path to becoming a Green Lantern.
After Crisis on Infinite Earths, Ch'p found that while he was still alive, the rewritten reality of the DC Universe made almost everyone, including his wife M'nn'e, believe that he had died years earlier. Instead of interrupting M'nn'e's wife with her new husband, Ch'p chose to relocate to Earth. Sadly, Ch'p would die years later when he was struck by a yellow truck on the Mosaic World.
6 Olapet
The protector of Sector 0345, Olapet is a plant being from the planet Southern Goldstar. When Olapet reaches the end of her life cycle and wilts away, she will pass on her Green Lantern power ring to her daughter, who is currently a seed that Olapet keeps in a small sack she carries with her at all times.
When the transfer of the ring happens, the new Olapet will take a seed from her dead mother's head and place it in the sack that she came out of. This seed will one day become its own Olapet. At this time, the Olapet line of Green Lanterns goes back 23 generations.
5 Amanita
Coming from the planet Muscaria and acting as the protector of Sector 3100, Amanita is a fungus that may well be older than the Guardians of the Universe themselves, though this rumor has yet to be confirmed. Along with the powers that come from being a ringbearer, Amanita also possesses a cosmic awareness on par with the Guardians.
As a fungus that has lived for eons, Amanita does things at a slower pace than most any other Green Lantern, but he has shown himself more than capable in a fight. If anything, Amanita understands that the arc of time is long, and there's no need to rush.
4 Collective
While it is rare, sometimes a Green Lantern is forced to retire. This was the case for TO-T-U-K, the Green Lantern of Sector 1287. After being told by the Guardians that it was time for him to pass his ring to a new hero, TO-T-U-K traveled to Valstan C5 to find his successor. At first, the readings from his ring confused TO-T-U-K. It seemed that the being who was worthy of the ring was close by, but the ring could never pinpoint them.
Finally, TO-T-U-K realized that the one who was worthy wasn't in a single location. The floating fuzzballs all over the planet were actually a hivemind race called the Collective, and the whole of the race would become the new Green Lantern of Sector 1287.
3 Dkrtzy RRR
So far, each of the Green Lanterns have been weird, but they all have physical forms. They come from planets (or in the case of Mogo, they are a planet). Sure, one is a virus and one is a plant, but these are still things that live and, in some form, breathe. Then there's Dkrtzy RRR, a mathematical equation that was discovered by the mathematician Timph Rye.
Rye had sought to prove that willpower was actually a mathematical formula and not a genetic trait. In his research, he discovered the formula and gave it sentience. That sentience became the Green Lantern Dkrtzy RRR. Now, as a Green Lantern, Dkrtzy RRR likes to enter its enemies' minds and erase them, something the Guardians really wish it wouldn't do.
2 Rot Lop Fan
In Space Sector 0911, nicknamed Obsidian Deeps, there are no stars. The beings that live in that sector live in a reality of complete darkness. As these lifeforms evolved, the need for eyes was non-existent, and so all of them are blind, but their other senses are far more powerful than others. This created a problem for the Green Lanterns when Rot Lop Fan was chosen to be a ring slinger. Without ever seeing light, Rot Lop Fan didn't understand what being a Green Lantern meant or what the ring could do.
To train Rot Lop Fan, fellow Lantern Katma Tui translated the training from light to sound. In time, Rot Lop Fan learned to control his ring through sound. Because of the difference in the way Rot Lap Fan uses his ring, his symbol is a bell instead of a lantern, and his oath is different as well; "In loudest din or hush profound, my ears catch evil's slightest sound. Let those who toll out evil's knell, beware my power: The F-Sharp Bell!"
1 Duck Dodgers
After being given the wrong clothes at the dry cleaners, intergalactic hero Duck Dodgers found himself as the new owner of a Green Lantern ring. Calling himself the Green Loontern, Duck Dodgers was called to Oa, the home of the Guardians of the Universe, where he helped a number of famous Green Lanterns, including Amanita, Ch'p, and John Stewart battle Sinestro and his army of robots.
While this is clearly not part of DC continuity, the idea that, even for a single episode, Daffy Duck became a Green Lantern and helped save the universe is too wild of an idea to ignore.