Anyone use YY-CHR for graphics on the Genesis?

[old man]

It has modes for more than just NES and SNES stuff, including a mode for Genesis graphics. You can get the English version here:
http://www.smwcentral.net/?p=list&type=tools

I'm still trying to figure out how the palette selections work, but it looks like it would make a capable editor for genesis graphics.

Note: US users will have to rename the yychr.eng file to yychr.enu to see english text in the program.

[Furnessly]

Now this is my area considering that I done sprite ripping for nearly 5 years.

The palette selector of YY-CHR only allows the savestates of NES and SNES emulators (such as ZSNES, Nesticle and VirtuaNES) to be used as a palette. That means if you want to rip some graphics using that, you have to recolour the graphics manually using a paint program (e.g. MS Paint/GIMP/Paint Shop Pro, GraphicsGale). Speaking of which YY-CHR can actually rip PC Engine games providing the game isn't compressed (sadly most are...) or doesn't use a weird graphic mode (like Jackie Chan's Action Kung-Fu).

The best bet is to use TileMolester since that has support of using Genesis savestates (from emulators such as Gens series, Kega Fusion and even the old Genecyst) to be used as a palette. Sadly though from experience many many Genesis games are compressed so they can't be ripped (you can rip via a savestate but your mileage may vary from 1 pose to all the poses) unless you know disassembly and know the decompression routine (beyond my league though), stored absolutely weirdly and can pull your hair out (like Desert Strike) or stored so badly that they probably are compressed (like World Heroes, Super Baseball 2020, El Viento and the pirated fighting games). There are even a few games that use an entirely different graphic mode like the Road Rash series, Road Blasters (I think...), the FPS games (such as Zero Tolerance [enemies], Bloodshot, Corporation) and the driving stage of Outlander that requires TileGGD to view.

There are some games that use "Nemesis" compression (named after the man who discovered it) that can be decompressed like Sonic 1, Sonic 2, Castle of Illusion, Arnold Palmer Tournament Golf (mostly apart from some unknown graphics), Streets of Rage 1 and 3 (2 uses a different method), Shadow Dancer, Revenge of Shinobi, Rent a Hero, Forgotten Worlds, ESWAT and the MegaNet games. There is a program that you can use but you have to know command line here: http://www.romhacking.net/utilities/766/