It’s fair to say that most things under the umbrella of Nintendo are fiercely protected by the company. Just recently, the company has been striking thousands of unlicensed uploads of Nintendo music ...
The official way to use copyrighted music on YouTube is through YouTube Studio > Audio library. The audio library includes free music and sound effects, some of which don't even require attribution.
Creators are now able to use certain sounds from Pokémon games without being copyrighted. The Pokémon Company has created a public sound library of audio from the 2006 games, Pokémon Diamond and Pearl ...