all kind of legendary pokemon are in different areas (levels) for example you can get zekrom in any cave level. there is a 5% chance of finding a legendary. if you see the ! pad sparkling that means there will be a legendary pokemon for a boss.remember if you lose to a legendary no worries you can still fight it again. :D
To get reyquaza in pokemon rumble blast you have to do tower areas over and over again. If you do this the "!" Launcher will be sparkeling. This will lead you to a battle with reyquaza unless you have beaten the EX royales in axel town, then it could be reyquaza or arceus I think.
In Pokémon Rumble Blast, you can battle Giratina a total of three times. The first encounter occurs in the Distortion World stage, and you can battle it again in the same stage after completing the game. Additionally, Giratina can be found in the Battle Royale mode, adding up to three opportunities to face this Legendary Pokémon.
It might depend on the Pokemon, though usually you can face legendary Pokemon again if you beat the Champion.
you have to defeat all gym leaders including elite 4 and champions then they will appear on the maps. if it doesn't work then don't blame me I got this answer from you tube myself and haven't tried it yet.
If your legendary Pokemon run away in Shiny Gold, there is no way of retrieving them again.
Yes, you can save the game before you catch it. but if you already saved it and the legendary is gone, then you can't catch it. if it is a Pokemon ranger game then you can catch it again
It's completely random. But doesn't usually occur until the post-story game. For example I found zekrom in a cave in the world axis...got creamed and when I went back he wasn't at the end of the level. After finishing it another four times he returned but kicked my @ss yet again...took me another seven tries to find him again...hope this helps.
Because you have to beat the game again (as in beat the final boss). Otherwise you could get a billion Rotoms/Unknowns easily.
you can go after the legendary pokemon, or beat him again.
get a friend bow and fight the legendary over and over again. your Pokemon at higher level helps. this only works after you beat the game
If you saved your game before catching the legendary Pokemon reset the game that way you can try catching it again.