you can't unless you get the event for it
diagla and murkrow
You can't catch bastiodon in Pokemon soulsilver.
in pearl palkia in diamond diagla
yes, at the spear pillar
catch it? no.
You cannot catch Heatran in Pokémon SoulSilver, you will have to trade for it.
No, you can not catch Phanpy in SoulSilver. It is a version exclusive to HeartGold.
You cannot catch Celebi in Pokemon Soulsilver, you have to transfer it from Diamond and Pearl (if you have it in those games).
No.
No.
you trade
You can use any type of Poke Ball that you want to catch Spheal in Pokemon SoulSilver.