The core PL/SQL language in TimesTen is identical to that in Oracle database (it is the same PL/SQL engine). There are a few features not supported in TimesTen because they rely on underlying database features that are not present in TimesTen. Also, Timesten PL/SQL has a much smaller set of predefined packages than Oracle database.
It's not really clear to me from your question what your concern is. Have you tried moving the data and the PL/SQL to TiemsTen and running it?