Lucas will appear at set times within the story, but once you've completed the game he will be in the Fight Area every weekend wanting to battle.
lucario
Speak to Dawn's/Lucas' little sister, she will tell you about 15 different rare pokemon.
It is a swarm Pokemon and you need the national dex.Talk to lucas' or dawns sister and she will tell you where to find a certain swarming Pokemon
Hi Lucas is the professers assistant. He has the third starter Pokemon (the one you or your rival haven't picked).
You can get it by talking to Dawn/ Lucas's sister in Pearl or Diamond. Each day they tell you a different species of Pokemon is swarming, and where to find it. The Pokemon changes each day, so Cubone will eventually be swarming, if it isn't today.
You can find Pidey in a Pokemon Outbreak in Pokemon Diamond
where do i find a totodile in Pokemon diamond/pearl on nintendods
You can not find or get manaphy on Pokemon diamond but you can by hacking, trading or... if you have Pokemon ranger you have to complete the manaphy mission and then you can put it onto diamond.
You can't find a Ho-ho in Pokemon Diamond. You have to migrate.
To get a Manaphy in Pokemon Diamond you have to get Pokemon ranger and defeat it and you have to trade it to Pokemon Diamond,Platinum or Pearl.
its not a Pokemon
Lucas and the professor would be at the lake where mesprit lives , but your friend I don't know.