Someone who pranks someone else is called a prankster. What is a person who gets pranked called? Is the term "prank victim"?
You have prankee:
The victim of a prank.
- 2003, Tara Calishain, Rael Dornfest, Google hacks (page 271): There are three ways to deliver the prank to the prankee. The first way is in person. (Wiktionary)
But “prank victim” is more commonly used.
Not a direct answer to your question, but nonetheless relevant: we can coin words by analogy and native speakers will understand them.
Prankster and the prankified.
We could even say
Did I ever get pranked. I got totally prankified.
The coined past participle prankified creates ad hoc the transitive verb to prankify by analogy with other verbs ending in -ify.