Pixel fonts are easy to use in flash and do not anti-alias. These fonts are good for specific sizes and become super blocky if used beyond their set size.

You can create your own pixel fonts. The general rule of thumb is that the font can not be smaller than 5 pixels high. This is due to the fact that the letter "E" is comprised of five lines. A line, a space, a line, a space, a line.

Pixel Fonts can be found at Fonts for Flash