[SPOILER] There are 3 scenes during the end credits: a mid-credits scene about two minutes into the credits that shows a bug being blasted by the laser shield, a post-credits scene immediately before the studio logos where DERIC finishes giving directions to the storehouse and realizes everyone has already left, and a final scene after the studio logos revealing that Zurg survived the explosion.
There's a dedication near the very end of the regular credits: "This film is dedicated to our families who supported us on this mission to infinity and beyond"
Many movies feature an end credit title card that says "Production Babies" or something similar, and first names, denoting children born to people who worked on the movie. This one's title card reads "Future Space Rangers".