I don't want to get anyone to switch from one emulator to another. I just wanted to help everyone to have more fun with the game because of the higher speed. And it works perfect on my laptop just like the original games.
I have a solution. There is no need for No$gba any longer. On DeSmuME go to config -> frame skip, then UNCHECK 0 (never skip) and set it to 5. So the game will run in the speed of the original games.