Dr. Zager

Dr. Masayuki Earl Zager is a scientist from Virbank City in the Unova region. He's a former scientist within Team Rocket. He's now a member of the Tekiyoku, in charge of a Science Division that conducts their own experiments to advance the organization. He's a Grass Manipulator.

Forming a Tekiyoku Science Division
Dr. Zager is a former Team Rocket scientist. He was recruited to the Tekiyoku years ago. Once in, he had an idea that since the Tekiyoku had all this power and were taxing the citizens, a division of them should find a citizen to use for experiments that needed a human subject in order to get advancements in medicines, new powers, etc. It happened, so Zager was in charge of this new division, called the Science Division.

He led the division to search for a citizen, preferably a young person, to be a human subject for experiments. In return for this, the Tekiyoku would pay the human's family a large amount of money every two weeks, an amount that would guarantee the ability to pay the taxes and have plenty left over.

The division Dr. Zager led consisted of himself, Xerosic, Professor Sebastian, Dr. Namba, and Charon. Other non-Tekiyoku scientists were involved as well, but not directly. Dr. Zager and the 4 others went to a couple of regions searching homes with at least one parent and a child. Dr. Zager didn't see any potential in the children he saw.

Involvement with Serena
Eventually, about 5 years before the start of the story, they went to Kalos. Upon arriving at Vaniville Town, Dr. Zager saw Serena, who was 13 at the time, a girl by herself at a park, not playing with other people. She was occasionally depressed, but had sudden bursts of anger, when she would kick a tree violently. The 5 of them went up to her. After calming her down, they asked her where she stayed. She led them to her house, mainly from being threatened if she didn't.

The woman who answered the door at the house was the girl's mother, named Grace. She was shocked and demanded to know what was going on. This is when Dr. Zager explained everything about his plan. He said that the experiments wouldn't take any more than 2 months. Upon offering the incentive to pay Grace a very large amount of money (even after the experiment was over), he also said that if Grace didn't allow this, the Tekiyoku would double the taxes for her and her daughter.

Serena ended up convincing Grace to allow this and they took Serena for the experiments. After the 2 months, however, they didn't release Serena and continued the experiments. They had already, unbeknownst to Serena, relocated Grace to Kiloude City so that Serena couldn't find her if she ran away.

Experiments continued, which included one where Zager and the others tried to see if Celebi could link to a human's heart and make that human be able to teleport to another place on their own at will. Dr. Zager believed that being connected to Celebi by spending long periods of time with it would help, along with some "magical" potions he invented. Celebi was left alone with Serena for periods of time.

The experiment didn't work, however, which Dr. Zager kind of figured would happen anyway. How the Tekiyoku encountered and temporarily captured Celebi for this is currently unknown, but it was set free after this experiment attempt.

Serena's Release
When the story started in July, it's been 5 years since Serena was taken from her home. Shortly after the beginning of July, Zager's Science Division released Serena. This was because Serena's body was beginning to develop immunities to the drugs and medicine given to her, thus weakening the intended effects of the experiments.

Serena was useless now. Dr. Zager and the others in his division simply made her leave. The last experiment attempt took place in Lumiose City, Kalos, so they released her there. They didn't tell her anything about where her mom was, nor did they give her any direction from here nor food nor money to survive a journey home.

They left her for dead.

Mokusetsu Encounter
Even though Dr. Zager was previously mentioned, he was first seen in Episode 9. He, Celosia, and Mable encountered the Mokusetsu as they were in Anistar City for Ikazuchi, the Electric Plate, which they already acquired a little time before this occurrence.

Dr. Zager saw Serena with the Mokusetsu right here for the first time in years, pleasantly surprising him. A fight ensued over the possession of the Electric Plate. Zager fought against Alain.

Zager couldn't hold up against Alain and was losing. Eventually, Serena became infuriated and jumped in, landing a huge powered-up punch to Zager, which defeated him. This power was the result of one of the previous experiments done by Xerosic, which didn't work at first. Zager was pleased that the experiment finally worked after all these years, despite his defeat.

After this, he admitted loss and retreated after getting a call in his earpiece from Celosia. Upon leaving, he gave Serena the address to her mom's house in Kiloude City so that she can finally reunite with her again. This was not a trick, but Zager truly doing this for her.

Celosia Kidnaps Bonnie
When he left, he came across Celosia, who had just kidnapped Bonnie, Clemont's little sister, amid the chaos of that battle. They brought Bonnie to one of Lysandre's old labs in Geosenge Town. They had left a note to tell the rest of the Mokusetsu to come there with Ikazuchi, and if they tried to fight, they would kill Bonnie. If they didn't show at all, they would use Bonnie for experiments with the Science Division. They locked Bonnie in a chamber in the lab.

From here, Dr. Zager and Celosia ran a few errands to get materials needed for experiments. They returned with an anesthetic vapor designed to put her in a deep sleep. Upon spraying it, nothing happened though, and they went for another errand. During this time, Bonnie had escaped on her own, which Celosia and Zager surely saw later.

What Zager did for Serena eventually led to the reunion of her and her mom, Grace.

Personality
Dr. Zager is a disturbed scientist who puts science above morals. He's all about success, power, and money. He wants to advance the Tekiyoku as much as he can, even at the expense of dividing up families and even killing the youth his division kidnaps.

This is basically his constant personality, except for the one part where he gave Serena the information she needed to meet up with Grace again. This seemed to be a kind gesture on his part after all he put Serena through, suggesting that he may have had a change in heart. However, this claim could be disputed among the fact that he and Celosia held Clemont's little sister, Bonnie, captive in the same manner afterwards. In more contrast, the kidnapping seemed to only be Celosia's idea, not Zager's.

Naming

 * His first name, Masayuki, is the given name of his Japanese voice actor in the Pokémon anime, Masayuki Omoro.
 * His middle name, Earl, was randomly selected from an English name generator.
 * His last name, Zager, is his last name in the English dub of the anime. It's a corrupted romanization of his Japanese surname, "Seger". The name Seger was chosen from seger cones, a type of pyrometric cone based in Germany. Pyrometric cones are used to gauge heatwork during the firing of ceramic materials.

General

 * His birthday, January 20th, is the original Japan air date of the episode of the Pokémon anime he first appeared in.