1996 Japanese Charizard Holo ($9K0$13.5K) This is from the earliest Japanese set in existence, and it is different than the 1999 design which will be worth less, which did not have horizontally arranged energy requirements
Titan of Industry and Elder Gargaroth are similarly versatile, and a green deck in possession of all three is one to be reckoned with
Whatever your reason is, yes, your Pokmon cards may be worth something
But theres one rule that goes a bit more unspoken, and so we take it as something deeper, more inwardly held, than we probably should: You cant make a deck with XYZ, or analogously, A deck with card XYZ is a bad deck. Many players will happily provide their opinion, solicited or otherwise, about a card you like