Can anyone tell me how to open the doors in sootapools city?

Well... Both questions all lead to one thing. To go to that underwater cavern thingy that Capt. Stern found. I think you'll notice it. On route 127 going into route 128 there's a big deep area, and if you use dive there at the end will be the enterence to the cavern. Go in it, use dive and go into the cave. Navigate your way through it and, in the last room, I think HM07 (Waterfall) is in there. Pick it up and go to the end, battle Archie and wake up Kyogre, yadda yadda yadda... Go to the top, meet up with Steven, fly to Sootopolis... Same as ruby/sapphire, basically, just that it's raining AND the sun is bright. Anyway, go to Sootopolis, meet up with Steven and go into the Cave of Origin, and find Wallace at the end. Tell him "Sky Pillar" and now you're on your way to Sky Pillar (which is on route 131; If you've visited Pacifidlog already, just fly there and head due east, staying as far top of the route (near the rocks) as possible.) Eventually, along route 131, you'll find a gap... Go into the gap, follow the little path, and you'll see a hole in a wall. Go in it, go to the top and exit, and once you're atop the hill that Sky Pillar stands on, Wallace will meet up with you (Aha, apologizing that he left you behind) and that he wants you to follow him. And... He leaves you behind again. How stupid! Anyway, there is no need to navigate through a maze... Because there is none! Just go to the top, awaken Rayquaza, and then fly back to Sootopolis. Once you enter Sootopolis, you will see a little scene of Kyogre and Groudon fighting. You can go up to them, however it's pointless. Just surf up to the gym and talk to maxie and archie, if you want, but you want to talk to Steven or Wallace (forgot which it is). And then there's the scene where Rayquaza "comes to the rescue" and the 3 legendaries depart... Finish talking to whoever you want to talk to and then well all that's needed to know is that now you unlocked all the doors and Sootopolis is safe.

Well... I must say that I'm sorry for being really bad at keeping something short and sweet, but... Can you rate/verify this answer??

1.You got to defeat team Aqua.

2.Sorry I cannot remember.

To open the doors you need to go do the thing with team rocket get the orbs and catch the legendary Pokemon then you can open the doors

Umm.. Duh it's sooooooooooooooooooooooo easy well you need a e reader for the doors and when you go in the cave of origan talk to wallace and go to sky pillar and rayquaza will stop kyogre and groudon battling and talk to him again and you get it duh!!!