No to receive more beldums breed a metang or metagross with ditto.
This is wrong.
You can make Beldum eggs with any evolved form of Metagross. Don't forget to have a Pokemon that knows either Magma Armor or Flame Body to reduce the number of steps you take in half :D (Since Beldum takes a lot of steps to hatch).
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it takes about 10,240 steps to hatch a beldum egg
yes 105 more steps
I Will Trade You A Beldum
you will find beldum in the cave
beldum evolves into metang at level 20