There are a whole bunch but if you are looking for free games here are a couple of my favorites at the links. Hope you enjoy!
You can catch more legendary pokemons on platinum. So you can catch more on Platinum, then the other games :)
Pokemon black and marriland but marriland helps you with your Pokemon Nintendo games.
Pokemon pearl
on pokemon battle reveloution for the wii, pokemon rumble blast and the original rumble are online games
I believe Pokemon world online is different from Pokemon crater.
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You are not allowed to catch other trainer's pokemons on any of the Pokemon games. You may only catch Pokemon from the wild or receive them through other means (events, game corner, eggs, etc.)
you will have many Pokemon games in 4shared.com
You can catch more legendary pokemons on platinum. So you can catch more on Platinum, then the other games :)
Pokemon black and marriland but marriland helps you with your Pokemon Nintendo games.
Mr.Backlot is an owner of Trophy Garden in Pokemon games like Diamond/Pearl.You can find him in Route 212,inside the Trophy Garden Mansion.He can tell you the Pokemons that you can catch by having the Pokeradar.You have to say the answer "yes" all the time in 2 questions in order to get Pokemons in the Trophy Garden.If not,he will not tell you the Pokemon he saw.Have fun!
depends on wath game. check out www.serebii.net they have all the facts about pokemons in all of the games.
Pokemon pearl
In Castelia City you can change your pokemons name. In the pokemon gym road of Castelia city there is a man in the lefthand building who will change your pokemons name. Just like in the previous games you can only change the names of captured pokemon. (Not traded pokemon, or pokemon labelled "N's Pokemon".)
If searching online games, mmo kinds - then the best you can find is Pokemonpets.com It has multilingual chat, all megas, all gen pokemons and even fake megas :) Register here -- pokemonpets.com/register
you can catch alot of Pokemon that are not in the other games.
No. How can you catch a Pokemon if you cant weaken it. In Pokemon ranger though you can capture your partner Pokemon.