The chart's pattern is obvious. Ground? You can't be serious. Look at it for 2 seconds
The thought that Sylveon could be ANY type doesn't make any sense to me. Look at it. Ghost? lol. Steel? What? Dragon? Definitely not. Ground? lolololol
Golurk, Jirachi, Altaria, Gligar. A Ghost, Steel, Dragon, and Ground type that doesn't look exclusively its type. I don't know why you think every Pokemon has to look exactly its type. Most cases, sure. But every type has at least a few Pokemon that don't look like it would be that type.
Sylveon could be Ground type because the only criteria for a Ground type is that it lives on or underground. You don't know its habitat, therefore you don't know that it isn't Ground.
Sylveon could be Ghost type because we have nothing stating that it is a tangible being. You don't know its physical being, therefore you don't know that it isn't Ghost.
Sylveon could be Dragon type because we have no proof that it is furry and not scaly or rough skinned. You don't know its skin, therefore you don't know that it isn't Dragon.
Sylveon could be Steel type because the only criteria for a Steel type is that its being is composed somewhat of steel. You don't know of its skeletal material, therefore you don't know it isn't Steel.
You are making yourself look narrow minded by basing your entire theory on one poster that is more likely coincidentally favorable to your argument than not. It also doesn't help that you are shutting out ideas that aren't your own because you claim that all Pokemon represent their specific type to the highest degree. Sylveon
could be
any type because we
don't know anything about it. I cannot stress that enough.