Morty and Morty

Date: 5/9/2016

Two brother dudes in a band find monsters and then travel through space to find out more. One dude dies. I was watching a video about these two twin brothers in a band together. One was obviously controlling the other through fear. One of them discovered an alien parasite that was like a cylinder with a sphere on either side. They travelled to its dimension using a staff with the parasite on it. Somehow they turned into Mortys and they were giant in comparison to the planet and its life forms. At the end, one Morty was about to leave and he asked one of the aliens where his brother went. To which he nervously explained that he left. The Morty then saw a coin that said "R.I.P. Morty 1980-2005. Was killed by our naval fleet which we made to kill him." and showed it to the alien who admitted that they killed him.