I try using the terminal and the Software Center and everytime, this message pops up:
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
desmume : Depends: libosmesa6 (>= 6.5.2-1) but it is not going to be installed or
libgl1-mesa-glide3 but it is not installable
E: Unable to correct problems, you have held broken packages.
I even tried to do sudo apt-get update
in the terminal but that does not fix it. I am running Ubuntu 14.04 LTS if that helps