Either Kroseth IV or an earlier version, under the name Kroseth the Invader, fought Honor Guard in 1959, and possibly many times in-between.
Kroseth disguised himself as a house in Goldwater Heights for 10 months in 2002 before being found out and defeated by Honor Guard. On a previous occasion when he and Honor Guard clashed, he had been thought destroyed but he actually fused himself with the Repli-Matrix, escaping when Honor Guard later used it to rebuild a destroyed house in early 2002.
Under the name Kroseth the Intruder, he fought Honor Guard in Montana in 2013.
Kroseth has the ability to mentally control other beings.
It's not known for sure if the Kroseth that was active in 2002 and 2013 is indeed the same one Honor Guard went up against in one of their very first adventures in 1959. It's possible that all three are different entities.
It is also unknown whether there is a connection between Kroseth and the Antarean Kaleidojewel.