Pender

To get a Pokemon infected with Pokerus, you have to make it battle wild Pokemon. Each wild Pokemon has a small chance of having the virus. To catch Pokerus, your Pokemon has to use moves that make physical contact with the wild Pokemon (like Tackle). Once your Pokemon is infected, there will be a purple PKRS sign in your Pokemon's summary page, and the nurse at the Pokemon Center will give you a brief blurb on Pokerus next time you heal the infected Pokemon. To spread Pokerus to other Pokemon on your team, make the infected Pokemon fight more battles. The other Pokemon in your party will have a chance of catching Pokerus. The Pokemon in the second slot of your team has the highest chance, and the others have a smaller chance of catching it. There is only a certain amount of time that your Pokemon will be able to spread Pokeurs to other Pokemon. You'll know that time is up when the PKRS sign is replaced by a smiley face icon in your Pokemon's summary page. For that reason it's a good idea to infect as many Pokemon as you can, even ones you never plan on using, and just keep them in storage (since that freezes the countdown for the Pokemon to be cured) so that you effectively have several viral incubators that you can use in the future to infect Pokemon that you want to EV train. Also, even when a Pokemon is cured of Pokeurs, it will still continue to receive the EV doubling benefit of the virus, it just can't spread it anymore.

The power items function similarly to the Macho Brace, cutting your Pokemon's speed in half during battle and influencing EV gain, but instead of simply doubling the number of EVs you receive, they add 4 EVs to the total depending on which one you're holding.

Power Weight= HP

Power Bracer= Attack

Power Belt= Defense

Power Lens= Special Attack

Power Band= Special Defense

Power Anklet= Speed

This actually leads to a higher EV gain per battle than with the Macho Brace, especially if your Pokemon has Pokerus. To continue with the Gastly example, a Pokemon equipped with the Power Lens with Pokerus will receive 10 Special Attack EVs after defeating one, rather than 4 from the Macho Brace, since the EV doubling effects of Pokerus are applied after the four EVs from the Power Lens are added to the 1 EV you get from the Gastly. Also, if you are holding, say the Power Anklet when you fight the Gastly, you will get 2 Special Attack EVs (1 from Gastly doubled by Pokerus) and eight Speed EVs (the Power items give you their four EVs no matter what Pokemon you fight, and will still be doubled by Pokerus even if the Pokemon you fight didn't give you a corresponding EV point. So if you fight something that gives you 3 EVs in a particular stat, and you are wearing the Power item for the same stat, and have Pokerus, then you'll receive a whopping 14 EVs from that fight! I hope this was an adequate explanation and that I didn't get anything wrong (feel free to correct me if I did). I'm not sure if this spoiler thing was necessary, but I may as well use it. Oh, and one last thing. You can buy the Power items from the Battle Frontier shop (16 BP each).