Do you know any good tutorial for pixel animation?
A developer named Alexey Garkushin posted a series of tutorials about pixel art making in general. They are quite interesting for a beginner (not all animation related but very useful): http://gas13.ru/v3/tutorials/sywtbapa_almighty_grass_tile.php
Animating pixel art is no different than doing it in other style. Aside from the technique and tools selected, the animation methods are practically the same. I always recommend to check out this wonderful tutorial that explains the 12 basic animation principles: https://vimeo.com/93206523
Also, if you are searching for a program to work with I encourage you to download Aseprite. Is cheap and easy to use (best pixel art drawing/animation tool out there).
Good luck with your future pixel creations! (￣▽￣)/