You can't find Bulbasaur in the wild on Pokemon Diamond or Pearl (not sure about Platinum).
bulbasaur
You don't.
Heres a wondermail for him really EZ! RC3@ -F8S 3CJP -FR3 42S1 2RCJ there you go! he's level 1 when you get him but he's strong and EZ to level.
bulbasaur was the FIRST Pokemon in the ORIGINALversion. Pokemon platinum version is the new version.sorry but bulbasuar isn't in Pokemon platinum!!Once you have the international pokedex (seen/catch all of the current pokedex) you will be able to get bulbasaur traded to platinum (along with all the other 300 or whatever Pokemon that aren't in platinum but in the other games
Shaymin and Arceus are the only two Pokemon you cannot find or recruit. You can find every Pokemon from Bulbasaur to Darkrai, but not those two.
you need protect for Bulbasaur and your partner
you use the gold mask
you can not recruit mew but you can recruit mewtwo cya later
Nope
Yes
You cant start as a shuppet but you can recruit it somwere
evolve all of your pokemon,recruit all the legendary pokemon.
You can recruit legendaries and do more things.
You have to complete the game, and then recruit it.
The same way you do for every other Pokemon.
You can recruit legendaries and do more things.