When does Machop evolve on Pokemon Diamond?

Machop evolves into a Machoke at level 28. but you have to trade to get a Machamp.

machop evolves into a Machoke at level 28. but you have to trade to get a machamp. That's right.Trade a Machamp.If you want to trade someone,go to the Global Trading System or trade in the PokeCenter.

-Fossilfighters00