I actually cared more that Agatha Heterodyne and Dr. McNinja were there than Skull. To each their own.
#3
Krisken
I have to agree with Ash here. Definitely cooler that Dr. McNinja is there!
#4
Gusto
Although that is a particularly adorable version of Skull.
#5
Hailey Knight
You also don't need permission, due to fair use laws in the United States. People throw in webcomic characters for cameos all the time. There's even a site for it:
I'm going to need to find out more about this "pig with jet-pack" character.
#8
Dave
I think it's great that the subject of the strip was about how web & print characters are equal. And I think it's ironic that Skull is in there for that very reason.
But it's great to see you again and I have been following your comic!