It's when you migrate them. Once you get the national pokedex go to Pal Park with a gba game and choose all the three regis to migrate. Once you get that done go back to your ds game and go to pal park then you can have them You don't have to migrate them.
You can also find them around Sinnoh. Registeel is deep within Iron Island, Regice is deep within Mt. Coronet, and Regirock's location isn't very clear, but it's in the area that you go to after you beat the elite four (the survival area and the battle park and all that).
There's a place that is all sandy and stormy and that's where Regirock is I can't find either Registeel and Regirock, and I haven't searched for Regice hey the second answer is correct first you go the that town which is in the middle of water,i forgot the name of the town,u will know when you see it,it floats on water,then surf to the left from that place,u will face some strong currents,go to the bottom end of the current and so into the current, after some time you will reach a place where you can dive,use dive and you will see an inscription on a rovk underwater,go up from there,then you will reach a cave,u must have a relecant and wailord,put relecant first and wailord last in your Pokemon list OS is it the other way,well try both,then at the top end of the cave use dig then the inscription there opens and you reach another cave,go to the top and again and read inscription,then they will say "some door open far away"then you have to got to various places like the sandstorm place,dewford town and go up from the cave there and little near the safari land. You wil find all regis there in different places and there are various techniques to reach them ,u must have strenght fly and off course patience,i got three of them their main attacks are curse. Superpower which they use in combination which makes them way powerful They do remain in those locations BUT you have to have the TRU Regigigas to activate their appearance to.(In the second answer) And yes the third is correct.
There are a lot of signs in Braille inside of all 4 of the caves, so you can search them up. THE THIRD ANSWER IS FOR EMERALD, SAPPHIRE AND RUBY ONLY. THERE IS NO CURRENT GAMES BESIDES EMERALD SAPPHIRE AND RUBY THAT OFFER THE HOENN REGION For them to be in those locations, you need to have gotten the level 100 regigigas from the Nintendo event.
Registeel is southwest of route 120and northwest or dewford. You go on the other side and there should be his cave. Desert north of mauiville.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.