Slumber Party #21
| Series | The New Mutants |
| Number | Vol. 1 #21 |
| Publisher | Marvel Comics |
| Date | 1984-11 |
| Type | Comic Book, Softcover |
| Language | English |
| Artist | Bill Sienkiewicz |
| Writer | Chris Claremont |
| Genre | Superhero |
| Published in | New York, NY |
| Pages | 48 |
| Series | The New Mutants |
| Number | Vol. 1 #21 |
| Publisher | Marvel Comics |
| Date | 1984-11 |
| Type | Comic Book, Softcover |
| Language | English |
| Artist | Bill Sienkiewicz |
| Writer | Chris Claremont |
| Genre | Superhero |
| Published in | New York, NY |
| Pages | 48 |