"You may surely meet people you think you know, but they will have come another universe. Don't be surprised."

Please examine the disambiguation page for this character.

Cyborg18 color

Alternate Realities

Universe 17 has an Android 17 but it is unknown if it has/had an Android 18

3, 7, 8 and 19 could have (had) an Android 18 too.

Universe 1, 2, 5 and 10 split off so long ago that Earth history may have been changed.