Ion

It turns out that Ion is the seventh replica of the original Fon Master Ion. He was made along with 6 others and chosen because he had the best abilities out the replicas, and the other replicas were thrown alive in the Mount Zaleho volcano, as stated by Sync, another replica of the Fon Master. The original Fon Master Ion was very sick, so Van and Mohs made the replicas, but eventually the original died and the chosen replica became the Fon Master.