| 188 | X-Men (2nd Series) | 1st appearance of Children of the Vault; 1st appearance of Serafina; 1st appearance of Fuego; 1st appearance of Aguja; 1st appearance of Sangre |
| 188/A | X-Men (2nd Series) | 1st appearance of Children of the Vault; 1st appearance of Serafina; 1st appearance of Fuego; 1st appearance of Aguja; 1st appearance of Sangre |
| 188/B | X-Men (2nd Series) | 1st appearance of Serafina; 1st appearance of Fuego; 1st appearance of Aguja; 1st appearance of Sangre |
| 188/NS | X-Men (2nd Series) | 1st appearance of Aguja; 1st appearance of Children of the Vault; 1st appearance of Fuego; 1st appearance of Sangre; 1st appearance of Serafina |