Šimige also appears in the Song of Ullikummi. He is first mentioned by Kumarbi while he plans where to hide the eponymous monster to make sure none of his enemies will see him while he is still growing. Later Šimige is the first among Teshub's allies to spot Ullikummi, and instantly arrives to share this information with him. The weather god's brother Tašmišu remarks that it is unusual for the sun god to appear at such a time, and that the news he brings must be horrible. Teshub nonetheless says a seat and a meal should be prepared for Šimige, who protests, to which the host reacts in confusion, assuming that he feels offended for some reason. The next fragment is not preserved, but it is presumed that it was the continuation of a "stereotypical scene of a messenger arriving with a message so urgent that he refuses to eat before delivering it." After telling Teshub what happened, Šimige is reassured by his friend that it is fine to sit down and enjoy the prepared food and drink. Later he returns to his journey through the sky. Mario Giorgieri points out that the Hittite translation refers to Šimige  with the epithet nepišaš, "of heaven," which finds no parallel in Hurrian tradition, but is well attested as a descriptor of his Hittite counterpart, the Sun god of Heaven. However, Volkert Haas noted that similar epithets of sun gods already functioned earlier in Mari and in Old Assyrian treaties.