Flotsam and Jetsam touring with KoRn is an oddity.
Of course, this was back when KoRn was new on the scene and weren't a household name band yet. I sure imagine Flotsam and Jetsam were touring with them at the end of the 1990s.
(The two bands remained friends years later, or at least members of them did. One of KoRn's guitarists helped Flotsam and Jetsam get another record deal after Flotsam and Jetsam had a record deal expire.)