Machoke only evolves when you trade it using the Game Link Cable. Find somebody who you want to trade it with, then trade back.
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Get Scyther to Lvl 41 and it should evolve. Pokemon Liquid Crystal Only.
Kadabra evolves into Alakazam when traded in Pokemon Liquid Crystal.
Poliwag evolves into Poliwhirl at level 25 in Pokemon Liquid Crystal.
In Pokemon Liquid Crystal, Haunter evolves into Gengar by trading it with another player. Once Haunter is traded, it will evolve into Gengar instantly.
I preference pokemon crystal