Koza

Koza is an exceedingly rare Ditto with the Imposter ability, which causes him to uncontrollably change into whatever he sees. Due to the stress this causes, his transformations are coupled with what seem to be arbitrary time limits that he also can barely control.

Appearance
Koza is generally not smiling or such, but he's been known to open up. He wears a blindfold or bandana he originally got from his father in order to keep from transforming. It's been reworked by a recent friend of his for more comfort.

Personality
In the beginning, Koza was irritable, grumpy, and very close-minded. He only opened up to a few other living things, and gradually learned as he traveled around the world what was good and what was bad. He usually despises turning into girls, but softened up to a few that made the experience fun for him. Generally, all he wants out of a transformation is being strong or agile, preferably both. But like all things, there are exceptions. Koza is quick to point out things he finds stupid or strange.

Pre-Twitter
Koza was born in a mitosis from another Ditto with the same problem in Giant Chasm. He was immature and had no control at all over what he could do until a stray Linoone discovered him. He was the first being in Koza's life to show any sort of sympathy for him, and took him to a den. There, Koza grew to call the Linoone his father, even though they weren't related. He gave Koza his blindfold and encouraged him to remain strong despite his disability. Koza is on his current adventure because of that Linoone's faith in him.

Twitter
Starting off on his journey, Koza ran into (literally) a few different Pokemon. Of significance was a strange Lucario named Snow, that hated the concept of another of him running around. He disliked Koza for quite some time until eventually warming up and assisting him out of several different problems. Koza also met a Shiny Floatzel named Star, and the two of them hung out like brothers whenever they got the chance. Also in the brother department was a Banette named Stitch, who re-made his bandana.

Koza met the legendary Pokemon Meloetta by chance, and was very angry about turning into her due to her wanting to see the transformation in action and taking his blindfold. The two of them had a shaky relationship until he turned into her again while she was trying to explain something, and she introduced to him the Pirouette Forme. When Koza took that instead of the Aria Forme, he immediately cheered up and began to appreciate her immense power. Only later did he learn that this was because she was a legendary Pokemon.

He came across another legendary, Azelf, while in the middle of another transformation, and tried to turn into him, but Azelf denied it. His claim that there were Pokemon stronger than him led Koza to Uxie, who let him take his form. While Koza was Uxie, he used his new nearly infinite knowledge to create a tape recording of information about the rest of the legendaries. Turning back led Koza to use this on a new personal goal of his to meet all legendary Pokemon.

His legendary encounters continued with a Shiny Celebi that forced him to transform. This ended up shaky, similarly to Meloetta, but with a similar end result as well; Koza ended up enjoying her form despite the girly garment it wore. The two are very good friends now, and they have even laid lips upon one another. He also ran across Victini, who did not know he was legendary. Koza became him and learned V-Create, amazed at the incredible power locked away in such a cute and tiny body. His first giant encounter was with Rayquaza, who let him take his form but did not give him any instruction on how to use it.

Koza met a Froslass named Kate and took her form, and the two of them became fast friends. Koza felt a strong attachment to Kate upon adapting her feelings, which strongly influenced his actions in her body. He has trouble controlling himself to be more Koza-like when he is Kate, but doesn't mind being girly. He has also kissed her, but doesn't want to do anything hasty. It is at this point that Koza has realized that he is becoming more chivalrous, which is a strange feeling for him compared to his short temper earlier. Koza has reverted slightly, if only to not be pushed around all the time.

Since then Koza has managed to meet a Zekrom and a Kyurem, transforming into both. He served as a true friend for Kyurem, who could not leave his cave at Giant Chasm due to the cold he caused. He also turned into Meloetta again, but was surprised to find that he had still not turned back after a good night's sleep. He spent an entire day in the singer and dancer's form, and eventually (painfully) turned back into himself. A couple of days later, he figured out that he could turn into Meloetta at any time by just thinking about her. Knowing the number of transformations must have had something to do with it, he tried the same trick with Celebi, and it also worked. He's since also solidified the form of Stitch and Kate.

Koza's search for legendaries has winded down. He happened across Moltres of the legendary birds, but the other two had not made further contact with him. He also came across a child version of Ho-oh. Koza assumed it was its normal size, but after speaking with Dawson eventually came to realize that the concept of baby legendaries was actually real, even though it seemed too unlikely. Ho-oh likes his company, but Koza has not yet locked in that body. He also turned into that Ho-oh's friend, a child Lugia, once, but that was short lived as the Lugia was in the ownership of a human that Koza did not want to be in contact with. Koza, thanks to a wandering Scizor, also met and turned into a Latios known only as Aero. He also got to taste Lugia's power a bit more thanks to Anthony's alternate form.

Once his journey winded down, Koza was feeling stress from not making any leads and only talking with those he considered stupid, so he took a vacation with Stitch. During that time, Miss Magius played with him after hearing that he really enjoyed being a ghost, and turned him into a fake Pokémon that looked like an evolved form of Banette. This disturbed Koza greatly, and being trapped in a form that he could not control hurt his psyche. His attempts to cheer himself up led him to Torch, who was currently exploring Orre. The two hit it off and Torch promised to figure out how his transformation had happened, which frightened Magius into dispelling the illusion that night. Once back to normal, Koza continued traveling with Torch as he had heard a rumor about a large purple Pokémon in the area, which could have been a legendary.

After some traveling and preparations, the two went to Citadark Isle and met the purple Pokémon, Shadow Lugia. Without knowing of the sealing of its emotions, Koza turned into it and immediately lost control, going wild and attacking who he considered at the time to be the actual fake Lugia. He nearly attacked Torch, but the brain of Shadow Lugia rationalized that Torch must have known him for a reason and assumed he was Torch's master. Torch had him fly to a cavern hideout where they remained until the transformation wore off. The shadow energy that Koza had burned in the process hurt him gravely and he had to rest for a while.

Koza finally got to turn into Torch two days later, and they explored Realgam Tower before escaping back to his home of Shamouti Island. Not all was well, though. The original Shadow Lugia seeked revenge, and to this end merged with another Pokémon and attacked Shamouti. Torch defended him on his own, and realized that his old friend was still attempting to regain control in the corrupted body, so the next day Koza decided to fight along with Torch in order to ensure their victory. This transformation of Shadow Lugia solidified and Koza realized that even though this Lugia and the one Anthony could turn into were different, they still counted together. The battle ended in him fainting and in Kienan losing his life.

In order to meet the legendary birds, Koza joined Torch on an adventure to the Seafoam islands as he had been invited there by Articuno. While there he managed to take Articuno's form, and also the form of a strange Totodile-turned-Giratina. He then joined Torch on a little adventure in the Hoenn reigon, where he was eventually caught up to by Zapdos and took his form as well. Finally, while in the area he met a Baby Groudon. After turning into it, he was found by Bombbird, who used his de-aging gem on Koza to see what would happen since he was newborn. Koza became an egg and was reborn with no memories of his past life, and he found Torch, who named him Grou.

The next day Bombbird found them again, explained the situation to Torch, and returned Koza to normal. Koza found that he still felt somewhat like a child, but these feelings passed when he started talking about his own father to Torch and a local Aerodactyl. The two finally went back to Shamouti and parted ways. While Koza was on his own, he met a Seviper that, interested by Koza's power, ripped his blindfold off his face. This tore it to pieces, and while swearing revenge on the Seviper when he had a stronger body to use, he gave the blindfold to Stitch to fix. Without it, he uses a crude leafy band made by a Leavanny. It did eventually get fixed though.

Koza met the Kalos-bound Pokémon Mystica during his exploits. The two of them hit it off, and Koza turned into the male of her species enough times to master it. He then invited Mystica to join him on his journey, and the two have been inseperable ever since. During a time with Stitch, in which they switched bodies in order for Stitch's mate Isabella to concieve with a compatible body, he confessed his love to Mystica, which he had been doubting as to not create a similar situation as with a Dragonair he had met. They are now officially going out as boyfriend and girlfriend. Mystica even discovered that through the use of her move Role Play, she can copy Koza's Imposter ability and turn into any form he has on him.

Finally, Koza had to deal with Aero once more, who had somehow been turned into a Meowstic. With his help, Aero managed to get the spirit of a malevolent Darkrai out of him, yet remained stuck in the cursed form. Koza's latter legendary encounters have been with a young Mewtwo, a Cresselia, a Dialga, and the trio of legends from Kalos, of which he liked Zygarde the most. He wants to find Heatran next, at Android the Genesect's instruction, but the journey into Stark Mountain would probably be too dangerous for him. This led him to attempt to master Torch's form. However, in his exploits to do such, he accidentally ended up instead turning into the ghost, Chicia, which follows Torch around. Koza was initially upset because Chicia was weaker and female, but he's come to terms with it. Heatran is his next immediate goal, but anything could happen.

Trivia

 * Koza was made on March 1, 2013. At the end of September 2013, his average tweets per day were around 105.
 * Since his creation, Koza has gained an average of 2.5 followers per day.
 * Koza's handle is a portmaneau of "Squishy" and "Imposter", two words that describe his physical form well.