Very clean pixel work. I love HxH. I would absolutely love to see more HxH sprites. Maybe Gon's adult form, or even his dad Gin. Keep up the excellent work! 
This is really good. Say, I'm hunting for a pixel artist for a game I'm making, and this style looks great for the format. There will probably be money involved, private message me if you're interested. :D
I wish I could choose colors like you. perfect.