http://dcx.sap.com/index.html#sqla170/en/html/818793336ce210148d48ba0c5bbd0c89.html
It is true that remote sites can be used as consolidated databases for a different set of remotes in a hierarchical configuration. But in a correct Mobilink hierarchical data distribution you have SQL Anywhere / UltraLite at the bottom of the hierarchy <> (mobilink server 1) <> SQL Anywhere in the middle <> (mobilink server 2) <> MySQL (or SQL Anywhere or any other supported consolidated db) on top.
Can you review your plan for migrating from MySQL to SAP SQL Anywhere?