The puppets were well done, I admit. But the jokes were far and few between, especially for something that was supposed to be a comedy.
I'll point out some of the jokes I found good and bad:
Bad: Mario's entire "jackass" act. The ocassional snippet of stuff relating to the princess (for continuity people, paulie) (mostly the "I was a gonna do her" line) wasn't that awful, except when it turned worse than the rest of it (maybe, just maybe, there was a hint of my brain trying to get me to have a flicker of a smile at the "I'm going to fill her holes with hot mozzerella" line, but it just came off... creepy as hell, like if Herbert on Family guy just outright stated he wanted to rape Chris).
Meh: DK's suicide itself. It depends on the audience, but if you are trying to attract the violent crowd that likes to watch family guy (which somewhat seems to be the case, can't be sure due to the general meh-ness of the jokes). If you were targeting that audience, yay. If not, you added another creepy thing.
Good: Only mario's "I was gonna do her" line. That's really about it.
Back to bad: The father son scene. I see potential here, but the execution was failed. It was like the dry humor in KoToR II where it seemed like your T3 unit said something insulting and possibly funny to another droid in his solo segments, except that... it's just beeps and boops, and in this case, it was just roaring. And the whole "only roaring" gimmick just is NEVER going to be funny. Ever. And if you are willing to sacrafice continuity and let DK Jr. talk, then you might as well let DK talk.