It's fake. It's not worth thousands of dollars, even if it was a legitimate misprint, it wouldn't be worth thousands of dollars. Stop talking absolute baloney, we weren't born yesterday.
It's a shadowless, 1st edition. These were out of print by the time of Jungle. To be a real misprint they'd of had to of added the Jungle symbol before they even printed the English Jungle cards. There were 8 print runs of base set, 5-6 of them would of printed alongside Jungle. The print that Wartortle would of come from would not of, it was already out of print.
Its also a very unlikely error, the symbols are part of the card. I could of believed this came from a Jungle mess up and not base set if it wasn't a first edition shadowless.
I really think you need to adjust your attitude, there's no reason to be a rude brat because somebody tried to help you identify the source and legitimacy of your card. If you don#t want the truth then don't post here to people who know their stuff.
Edit In fact,
who has told you it's worth "thousands of dollars"? Why don't you put your money where your mouth is and send it to get PSA graded? See what the professionals think?
https://www.psacard.com/services/psagradingprocess
Here's the link, let us know how it goes.