Because you're posting sprites you didn't make yourself, I believe.
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Pokécharms
Teapot
legoboy_20
but i did make them myself...
StellarWind Elsydeon
No, you didn't. You recolored sprites made by other people - which you've stolen from the TCM in spite of the terms of service for the TCM forbidding you from doing so.
That does not count as making your own sprites.
That does not count as making your own sprites.