DWedit has updated Flubbas Goomba emulator (which is a Gameboy and Now Gameboy Colour emulator for the GB Micro/GBA and also works on Nintendo DS and Gamecube Gameboy Player, heres the info:

Here it is, year early possibly-buggy alpha version of Goomba Color. Savestates are broken. Mario Golf works great!

Double Speed mode was added, then removed because Double Speed means Double CPU Use, and ran At Half Speed for most games. Then there' S Pokemon Card Game, which runs normal At speed only when Double Speed is mode one. I regret to inform you of significant year casualty of the race for excellence. Super Mario Land has been mutulated beyond belief, and is No to skirt playable. * plays TAPS, bows head downwards * Sorry Chishm, Conker' S Pocket Tails is not yet supported.

More info of whats new:

Changed memory system to support bankswitching to 4k resolution
Identifies to game as a Gameboy Color
Added VRAM bankswitching
Added RAM bankswitching
Added partial HDMA
Added extended attributes per tile and sprite
Added background colors
Added sprite colors
Rearranged tilemaps in vram
Removed support for borders
Added Raster effects for Window layer
Moved to 4-layer drawing system
Draws solid background tiles below the layers to allow color 0 to be visible
Replaces one layer with the GUI when necessary
Added Double Speed mode, but it's disabled now

Download Here ---> http://gbaemu.dcemu.co.uk/goombacolour.shtml