This site is dedicated to collecting Ultraverse comics, which is a lot easier than you think. Many of the comics (including the ones with full hologram covers) were pretty expensive back in the early 1990s, but now you can put together a good run on the cheap. A good place to start is the checklist.
One of my goals is finding and cataloguing all the various books and items that were published … especially the harder-to-find and unusual variants. Cards, too. Uh, and toys. And pins and pogs and watches and movies.
I’m not sure if anyone has a complete run of every Ultraverse comic. I’m close, but there are bound to be a few that I don’t even know about. If I find a new one I’ll write about it here.