In Pokemon heartgold and soulsilver, the only way to get a blastoise is to go to professor oaks lab after you beat the gym leaders in kanto and you can choose one of the kanto starters
check this site for more: serebii.net
or: clover.top-forum.net
zygloman
Pikachu Lapras Charizard Venasuar Blastoise Snorlax
Pikachu, Charizard, Blastoise, Venusaur, Snorlax, Lapras.
You need to pick Squirtle as your starter,And evolve him into Blastoise.other than that no idea.
Manaphy and Blastoise cannot breed. Manaphy can only breed with ditto or another Manaphy.
I forgot the levels but here are the Pokemon Pikachu Blastoise Snorlax Lapras Charizard Venusaur
Yes, you can capture Heracross in Pokemon HeartGold (And in Pokemon SoulSilver). You must go to Azalea Town and heabutt into the trees there, and eventually you will encounter one.
Yes all Pokemon can follow you onheartgold and soulsilver. Think of a blastoise following you.ahhhhhhh!!!
No
You cannot capture your opponents. You cannot capture your opponent's Pokemon, either. You can only catch wild Pokemon.
No, you cannot catch a Charizard in Pokémon HeartGold and SoulSilver.
No. It is an event pokemon, or you can hack it which I don't recommend.
You capture Zirachi in MT Silver on the grass