Inertia
Inertia (Thaddeus Thawne, clone of Bart Allen) appears in 6 issues in grailworth's catalog, and was first published in 1999. First appearance: Tiny Titans #5 (2008), cover dated 2008.
First appearance
Every appearance we value
Teen Titans (2003) 3 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.