You don't know?!It's Dialga of course!
There are about twelve of them, but some of them are only available through cheating or going to specific Pokemon events.
i know how to get nearly every Pokemon without a cheating device. do you know how to get Deoxis on emerald Or is there a way to get Darkrai on diamond without cheats?
By the way, they are the legendary cats, not dogs. The Pokemon Company revealed that Raikou is a tiger, Entei is a lion, and Suicune is a cheetah.
you use them to get arceus whitch is a very rare Pokemon but you also need certain pokemmon my friend mikey is trying to do that
Either cheating or trading or story events. I have heard a rumor after you get all 8 badges there is a extreamly small chance of running into any legendary Pokemon in the wild but that is just a rumor True or false i don't know.
the legendary Pokemon in diamond and pearl are dialga and palkia.
The only way to get the Legendary Beasts in Pokemon Pearl is to find them in FireRed, LeafGreen, HeartGold or SoulSilver, catch them and then migrate them over to Diamond via Pal Park.
stop cheating
No, a Bidoof cannot evolve into any Legendary Pokémon in Diamond.
Heatran
you cant unfourtanately
a lot of legendary Pokemon