Complex sentence: Don Rosa also revealed in at least two stories another thing that makes Flintheart a counterpart to Scrooge: the Number One Rand, the first coin Flintheart Glomgold ever earned (or stole).
Split into simpler sentences: Don Rosa also revealed in at least two stories another thing that makes Flintheart a counterpart to Scrooge. The Number One Rand, the first coin Flintheart Glomgold ever earned (or stole).