I have just released VGB-Android 3.9, the new version of my GameBoy Color, GameBoy Classic, and Super GameBoy emulator:

https://play.google.com/store/apps/details?id=com.fms.vgb

In this new release, I have finally fixed the speed problem reported by many VGB users. The problem mainly affected Pokemon games but wasn´t limited to them. Starting with this version, VGB will no longer lag in these games. There have been a few other fixes as well, and I added six new games to the Cheatopedia: the Contra games and the TMNT trilogy.

• Fixed the lag problem in Pokemon Red, Yellow, Green, Blue, and other games.
  
• Fixed exit from HALT instruction.
  
• Now resetting DIVREG on writes.
  
• Fixed record/replay indicator in Super GameBoy mode.
  
• Fixed folder display issue in Cheatopedia.
  
• Added Contra: Alien Wars to the Cheatopedia.
  
• Added Contra: Operation C to the Cheatopedia.
  
• Added Contra Spirits to the Cheatopedia.
  
• Added Teenage Mutant Ninja Turtles to the Cheatopedia.
  
• Added Teenage Mutant Ninja Turtles 2 to the Cheatopedia.
  
• Added Teenage Mutant Ninja Turtles 3 to the Cheatopedia.