Further searching though resulted in me finding a modifier in blender which attempts to downscale the amount of faces which could've been used to try and cover up it's origins. Upon testing this myself, I got a fairly similar result though it'd take awhile to figure out the exact number used to get that result.
95% likely that OP is claiming Nintendo's property as their own, 5% for doubt. I would've said 10% but you lied about it being your first model.
*Edit: 99% likely, 1% doubt. Checked OP's Sketchfab and did a comparison of their Venusaur upload and an X/Y Rip, was exactly the same.*
Also based off the texture the OP provided, the UV's are exactly the same (Which I believe is impossible? Because everyone maps UV's differently). Using the Decimate modifier distorted the original texture and in the original the eyes had their own texture image so OP had to combine the two together in a single larger texture image since Pixelmon doesn't support multi-texture models. The original texture was also traced in order to get the result OP provided, likely to cover up it's origins.
It's a pretty good fake... o.O
PSN ID - xanderindalzone
My Twitter - https://twitter.com/alex_simon_
My Pixelmon Server IP - hcpixel.on.vg
This IS a fake. My previous analysis was rather bad and now that I look at it with extra caution, this is definitely fake. Every part of this model is EXTREMELY similar to Nintendo models, from the rigid structure and hands to the texturing.
Thank you Scrotty for correcting my bad analysis.
I wish I could go lower than this due to sheer disappointment, but.... 0/10.
Model Rater, Pixelmon Tester, Official Forum Supporter, Gym Development Member!
Not the Pokemon we need, but the one we deserve.