Pokémon Themed Channels
This page has a list of many Pokémon themed YouTube channels. Feel free to tweet at @nirthpanter if you want more channels to be added. Usually I look at whether the channel has a decent following, has been active recently - or is of significance in the community in some way. It is my subjective cut on which channels have been added. The idea is to get a quick sense of how Pokémon as a topic on YouTube is performing. You have to click on the given channel name in order to be sent over to see more details on SocialBlade.