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.
Depends on the point of view:
from the prankster the word "target" could be relevant
But, from a bystander the word "victim" would also work.
The person who gets pranked can be called the laughingstock or the butt of the joke. In addition, there are many words for victims who are tricked by minor frauds, which can also be applied to prank victims: sucker, dupe, mark, chump, sap, patsy.
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.