Please can you tell me a technique to catch the legendary dogs.I know you..

I came across them randomly. So I don't think there's a certain technique to catch them, and for the colosseum bonus disk, try buying it of the internet.

Just keep looking, and try using max repels. Also, the bonus disc is no longer available.

Well you have to run into it randomly, after that walk into a cave near a patch of grass. Go into the cave and walk out check your pokedex to see where it is at.

This could take awhile so be patient. Once you find them put them to sleep with sing or hypnoses. A good item to have on your Pokemon would be quick claw. Make sure you have plenty of ultra balls. If you do not out it to sleep pon the first turn it will run away. Also I havent tryed this but try to save when it is near your area.

Catch Mewtwo in Cerulean cave. Then go to the patch of grass to the right of Celadon.I did that 2 times without fail.
Hope that Helps!

Use a max repel...when you find it...use Mean Look..a move that Zubat and Hunter can learn...after that put it on the red zone...then start catching

1) Just in the wild, around Hoenn. No water, just the grass. I advise using a million Repels in the wild, and keeping a Wobbuffet or something like that in your Party. That way, the dog you encounter won't escape.

2) The Colosseum Bonus Disc was only available at the time of launch, sorry.