The VG Resource

I am curious if there are any emulators that has a sprite viewer like MAME emulator has?
 
Particular looking to extract the font from "The Immortal" from Genesis/X32. I know Roket has extracted most of the other sprites but font and tiles.
I am able to use screenshot capture to extract some of the font like below, cut out and rearrange the font.



However, I know in some cases there are entire font available in a game but some of the letters are never used. 
Is there a way to view/extract/dump the rest of the fonts if they are never shown in game?

Best Regards,
jch02140

Look for Gens Kmod or DebuGens.

Here's a tutorial: http://wiki.vg-resource.com/wiki/Sega_Genesis