I would suggest you catch one in the Safari Zone, or trade for one. If you've completed the game you can also migrate Pokemon from the Ruby, Sapphire, Emerald, Firered, and Leafgreen (if you have a marowak then migrate it, BUT be warned once you migrate your Pokemon they can NEVER RETURN to their original game pak).
Marowak cannot be caught in the wild in Pokemon Platinum. You'll need to capture a Cubone, which can be caught in Route 203 when there's a swarm of Cubone. (You'll need to talk to Lucas'/Dawn's sister in Sandgem Town) When it is captured, you can evolve it into a Marowak at level 28.
Marowak doesn't evolve
Marowak does not evolve.
Marowak doesn't evolve into anyone. Maybe you are confused with Cubone who evolves into Marowak
cant you have to find cubone in the safari zone (i forgot where he/she is) but you can evolve cubone into marowak
Marowak is #105 in the national pokedex, and it is a Ground type Pokemon.
Your shiny marowak has good moves but if i were you i would delete ice beam and make him learn the bonerang.Marowak cant learn ice beam,thunder punch and flamethrower. trust me it can! http://www.serebii.net/pokedex-dp/105.shtml <theres the proof!
If you really want a Marowak, you can get one by evolving a cubone or catching one on Victory Road.
after you kill marowak you have finished the whole game! no kidding! it is a realy small game
yes it evolves into Marowak
catch one.
In the mansion the marowak switches are on levels 2,and 3.(you are pobaly gonna get attacted along the way.)