Marro uses his Gunk Shot on his trainer to slime him every day. So much, that he is being punished by being forced to not have a favourite food :O !!!! So, feed him anything and he'll happily make a portrait of you using his slime trail. Currently, Marro is looking for a pet cat (don't ask) and a female 'friend'. Make sure you hug him to get rid of his mate-less-ness. All you'll get is a slightly green slippery shirt. He enjoys going on certain forums with his trainer and, being the first egg he obntained, gets the majority of the babysitting chores to look after any future novelty eggs.