'Pokémon Endless Adventure'

[NICKtendo DS]

That's the problem with Pokemon Spriting these days.

Always focusing on the game, but never the anime itself.

It's not a problem. People choose to make game-related stuff, that's their deal. Mind you that custom spriting is actually what some people do for a living. It's something people can ask money for. Sure, it's copyrighted content, but the effort put into it is all the same. Him making these in his spare time is something others can benefit from, so be grateful he does it.

Requesting is not allowed unless it's done in the proper forum. Know that he has all the right to choose not to accept your request.
If you can't deal with the lack of anime-related sprites, make your own. Simple as that.