I just know that Marty met Lisa once, and that Lisa confessed to him that she hated he and Sid when she was a kid, because they had all these different shows on all three networks, while her father only had one show (in syndication), and she never understood why; Marty told her it's because her father was a much better puppeteer than them, since Jim really did care about the art of puppetry, whereas Sid & Marty just went for the mass.