The following is an official statement from developer Niantic in regard to Pokémon GO cheating and the purported shadowbans that have been affecting players recently:
“Niantic is committed to maintaining the state of Pokémon GO and our community of Trainers. People who violate the Pokémon GO Terms of Service (including by using third party software and other cheats) may have their gameplay affected and may not be able to see all the Pokémon around them. While we cannot discuss the systems implemented, we can confirm that we are constantly refining new ways to ensure the integrity of the game in order to keep it fun and fair for all players.”
Source: Miketendo64
Pokémon Blog 
Thanks for sourcing us, we really appreciate it. It isn’t always easy trying to get big companies to give you a few moments of their time especially when they have such busy schedules and we are only a small website.
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Thank you very much! Your website is very helpful as well. I tend to lean towards your website than Serebii any day.
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Thank you for the kind words – really glad you find it helpful 😀
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