>>58272275though I do think there's a bit of jackassery with the precision.
How the fuck does one know how big that anime groudon is to the inch?
I bet whoever made that (a redditfag apparently) grabbed a random frame from an episode with groudon in it, that showed them and the trainers roughly together, and counted pixels.
Knowing how scales in the anime work, doing this would only be valid, to only within a few feet of precision mind you, for that one specific scene (probably just that one specific frame even), and no more.
For another similar scene, you would get different results that vary wildly, depending on how big the animator wanted to make the pokemon and the trainers for that frame.
Also, if you're using a trainer as a benchmark, you need to know how tall they are, which is its own separate can of worms.
For many anime scenes, its pretty much impossible to tell with a higher accuracy how big they are, other than "bigger than normal by a lot" or whatever, because its not a sure thing, its a continuum. Claiming otherwise is retarded.
There are exceptions to this, such as pic related (based on some charts from the teraleak that explicitly say what they are, so I have high confidence in it), but they're few and far between.