How do you get Swinub in Pokemon Diamond?

Answer 1

Swinub are swarm Pokemon, so you have to wait for a swarm with swinub to occur after you have the national pokedex, which you get for seeing all the Pokemon in the Sinnoh pokedex except manaphy. Swinub usually are near Snowpoint City, on the route to the left. Talk to Dawn's/Lucas' little sister in the second house on the bottom of Sandgem Town. Also, the t.v.s may talk about a swarm occurring. Also, to evolve it into mamoswine, make it evolve into piloswine, and go to the move remember guy in Pastoria City at the house to the far left. you need a heart scale to teach it ancient power. Now just level it up once and you have a mamoswine.

Answer 2

Get the National Pokedex, get the Pokeradar, then go to Lucas/Dawn's Sister in Sandgem town and she will report to you about outbreaks of pokemon Swinub will be in one of these outbreaks when she reports that Swinub are appearing south of Snowpoint city. Remember, you have 24 hours before this outbreak expires so check every day. I found that if you change the time to 11:59 p.m. and boot the Diamond game, it thinks a day has passed so she will give you another forecast so just keep doing that until she gives you a forecast you like and go catch whatever she's forecasting