Mad scientist and primary antagonist of the sequel.
Jacobo is the hidden enemy driving the central threat.
The antagonist creates real monsters and devises a revenge plot against Mystery Inc. for a previous defeat, directly placing Fred's team in danger.
Daphne becomes a direct target of Jacobo's revenge operation.
Jacobo's monster plot terrorizes Coolsville and later places Daphne in the deadly confrontation at the Monster Hive.
Velma is Jacobo's most effective investigative opponent.
Velma investigates Jacobo's grimoire and later discovers evidence that exposes the disguised antagonist's plan.
Shaggy directly interferes with Jacobo's monster-making scheme.
Jacobo's monsters capture Mystery Inc., while Shaggy helps restore the control panel and reverse the transformations.
Heather functions as Jacobo's false identity during the revenge plot.
The gang unmasks Heather as the Evil Masked Figure, then discovers that she is actually Jacobo in disguise.
Explore the full interactive character relationship map of Scooby-Doo 2: Monsters Unleashed
Related entry on Wikidata (Q51297934), public domain (CC0).