Pixel Art is not always Isometric. Isometric is the most popular form of pixel art, but pixel is art is also making sprites for games (the old games), etc. It's just using pixels to create art.
Just something I made a long time ago.. remember that pixel art is not always Isometric!
The rest of my better pixel art are in the other laptop so... i'll post them later.
Edit: Here's the tutorial I made based on the above pic. that was the time i used microsoft paint.