It is not known to evolve into or from any other Fusemon.
Sunblast possesses the body shape of Sunkern with various characteristics of Karrablast. Its body is primarily blue, with two black stripes and one yellow stripe running down from its face. It also has two yellow eyes with small, black pupils. Sunblast's pincer at the top of its head allows it to cling to tree branches for shelter. If a tree branch is seen with two pincer marks embedded in it, it is a sign that a Sunblast had once hung from it.