Future Androids 17 and 18 → Future Yamcha
Future Trunks reports that Yamcha died in battle against the androids. The report does not identify whether Android 17 or 18 delivered the individual lethal attack. He initially identifies them as Androids 19 and 20, but the future enemies are later confirmed to have been Androids 17 and 18.
SourceChapter 335 — A Message of Terror (Japanese: 恐怖のメッセージ)Full Color Androids and Cell Arc, Vol. 1 · Akira Toriyama / Shueisha
Additional sourceChapter 348 — To the Laboratory...!! (Japanese: 研究所へ…!!)Full Color Androids and Cell Arc, Vol. 2 · Akira Toriyama / Shueisha
Additional sourceChapter 350 — Androids 17 and 18, and...16 (Japanese: 17号・18号、そして…16号)Full Color Androids and Cell Arc, Vol. 2 · Akira Toriyama / Shueisha
View this volume on Amazon Japan ↗Full Color Androids and Cell Arc, Vol. 1 (opens in a new tab)
Japanese-language Kindle edition · Affiliate link
View this volume on Amazon Japan ↗Full Color Androids and Cell Arc, Vol. 2 (opens in a new tab)
Japanese-language Kindle edition · Affiliate link