The one that is in the trainers' school will give you a TM. Cynthia; if you beat her you are the best in the game, but not better than other trainers. The most rewarding Pokemon battles in any game are ones in which you learn something about battle tactics or just barely acheive a victory. When you have Pokemon on low levels against an experienced opponent (especially in the Pokemon League, towards the end), what happens during a battle shows you how well you have developed your training skills. I find that Wi-Fi battles are the most rewarding as you discover new battle tactics and new Pokemon combinations you can use to improve your team.
Get a Pokemon with Pokerus and put the Pokemon you want to have it in the party with it. To transfer the PokeRus condition to other Pokemon, have the infected Pokemon in the party with the desired Pokemon and take it out to battle. After a few battles, most (or all) of the Pokemon will have contracted PokeRus.
It's a possibility but it will be most likely for 1 or 2 episodes. Well now its Pokemon galactic battles, and misty could make an appearance...
You will need to search everywhere in Sinnoh. Wild Pokemon battles should add most Pokemon to your Pokedex. Trainer battles will help you find some more, especially the gym leaders and the elite four. The rest should come with the flow of the story, such as Dialga, Uxie, Azlef and Mesprit
You get it by seeing every Pokemon in Sinnoh you can do this by: 1. Completing the game and doing most battles with trainers. 2. Evolving lots of the Pokemon you have. 3. Trading with other people who have the game. 4. Using cheats.
Arceus
Dialga!!!
Most game stores.
Well the legendary Pokemon is Dialga but most of the other Pokemon are the same.
The best Pokemon on Pokemon diamond is obviously a Bidoof...Joke :)No this is entirley an opinion based question but the best aka most powerful,and most defensive is Diagla
i would have to say Dark Rai
Arceus the Alpha Omega God Pokemon
im sure it giratina