you get regigigas by getting team charm to unlock the aegis cave the you have to spell ice rock and steel with the letter stones and battle the regis then you beat regigigas and go through the caves and spell again. (you might be able to recruit the regis on the way there) it is possible to get the king of the regis if you have luck but if not you have to go again Sorry but that is all i know:{
You have to go along the other way around by lilycove and go around that way. the regi cave to unlock regis is in there around the end so u can get that to.... GOOD LUCK!!!!?~pearl freak~?
if you go on a secret path, it will take you to the entrance to unlock the 3 regis or if you go the regular way, it will take you to slateport
No there isn't another cave. Mewtwo is in the cerulean cave. Jirachi is only available in the preordered Pokemon Colosseum bonus disk that's the only way i know of.
You can only put in cheats to unlock it
You have to have defeated Team Rocket in their Veilstone City HQ.
If you mean the underwater path to get to the ruins where u can unlock the regis then you go west and make your way through the current till u find a spot to dive then use wailord and relecanth to unlock them.
multiplayer
i reallly don't know any easy way except the original way. that is go to the cave with the code [i don't know where that cave is] i know you need the HMS surf, dive and dig.then you go and catch them and sry i don't know where the regis are.Hope i helped a bit.hexo67:go to pacifidlog town and head far west and take a dive in the patch of deep water you will find a cave in which you must use dig and have a relicanth and a wailord and you will see three caves around the place you will find the regis in them.
No but there is another way
There are only two ways to actually get the Regis legitimately. One was to go to the event that was held at Toy's R' Us and get the level 100 Regigigas which would allow you to unlock the other Regis. If you missed the event though, you'll have to wait and hope for another one. The other way to get them would be to trade it from Diamond/Pearl or migrate them from Sapphire/Ruby/Emerald.
you get the regis in emerald ruby or sappaire those are the only way