This answer will note the Pokemon that get traded to the player prior to evolution.
Blue (Japan)
- Haunter
- Graveler
Yellow
- Machoke
Sun and Moon
- Graveler-Alola
Ultra Sun and Ultra Moon
- Phantump
Scarlet and Violet
- Haunter
...and that's it! I guess you could also say that the NPCs get some trade evolutions (e.g. you trade a Kadabra in Japanese Blue, can have a Poliwhirl hold King's Rock in FRLG, etc), but that has very little practical bearing.
In-game trade (Bulbapedia)