>>41886333There are pokemon stronger than humans, faster than humans, smarter than humans, and all around greater than humans, but there's no particular organization to any of it. The only way they'd unify against humans is if Arceus or some similarly dramatic being called for it, and even then there are many pokemon that would stay loyal to good masters. If they did organize against humans, then it'd be a bloodbath because pokemon are shown to be naturally superior to humans in a variety of ways, including intelligence (but importantly not technology). If the legends got involved, then humans would be contending against creatures with literally divine-tier powers-- the sort that can whimsically obliterate part of an island, tear open holes in reality, bring back the dead, etc.
That said, humans aren't really shown to be appreciably violent in the games, largely owing to the focus on kid-friendly themes, but it's repeatedly shown that they have technology that's well ahead of what currently exists. It'd be easy to weaponize the same tech that created portals to other dimensions or created clones of everything from fossils to other legends. Many of the villains in the anime also use some sort of supertech; the villain in the 2001 movie effortlessly captured the three legendary birds (and was only foiled due to not being prepared for lugia teaming up with a human), the villain in the zoroark movie used advanced holographic technology, that one place where Lati@s lived had an advanced defensive network that got hijacked, etc., etc.
Unified, either side could roundly fuck over the other, humans though advanced technology and pokemon through natural superiorities. In practice however, neither side would unify enough to defeat the rest of the world; there are too many people and pokemon that would oppose them, regardless of which side it is.