“What is a ghost boxer called?”/“A phantomweight.”

Boxing has a bantamweight class, but what about a phantomweight? A riddle is:
 
Q: What is a ghost boxer called?
A: A phantomweight.
 
The joke was posted on Twitter on 2009.
 
       
Twitter
Bollywood Sargam
@bollywoodsargam
Ghost jokes - 5155 Joke: What is a ghost boxer called?
A phantomweight. .... http://bit.ly/309JK
3:53 AM - 24 Aug 2009
       
Twitter
Carri Nash
@teambudd1
RT @ClactonGirl: What is a ghost boxer called? A phantomweight.
4:48 AM - 24 Oct 2009
 
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
What is a ghost boxer called? A phantomweight.
   
YouTube
Ok, here is the joke. What is a ghost boxer called? A phantomw…
botcaster inc. bot
Published on Jan 22, 2016
What is a ghost boxer called? A phantomweight.
   
Twitter
Lucky Score
@LuckyScoreNet
What is a ghost
boxer called?
A
phantomweight.
#Joke from #GhostJokes in #Jokes, #Humor and #Satire
4:09 AM - 28 Dec 2017
 
Twitter
lorraine Jo King
@LahLahBean
#WednesdayWitticisms
What is a ghost boxer called?
A phantomweight.
1:45 AM - 8 Aug 2018