For example, in Pokémon Yellow, there is a trainer that is willing you to trade a Machoke if you trade him a Cubone, which means that the Machoke (called Ricky) will evolve during the trade, giving you a Machamp. Are there any other examples of this in other Pokémon games?
Pleaselog inorregisterto add a comment.
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)