How to open the locked door in canalave city

Answer from: daniel simpson
First you need to complete the cristelia event by getting the key for the door in carnelife city and go to the docks and talk to the little boys mum an she will say he is sick and then go to the guy at the boat he will take you to a island and you find cristelia it will fly away and drop some thing and get it. then go to the house that is looked near the pokecenter and there will be a guy in there that lets you go to sleep say yes and you will be in newmonn island

Answer from: mr gav man
If u wanna get to newmoon island and get more out of it ill also tell u how to get shaymin normal form first u gotta go buy action replay in like target or some other store then find the code online for walk through walls then get on the game go to canalave sail to fullmoon island stay where u are and just walk sideways then u find newmoon island ok now for shaymin for this u will need action replay too so u fly to pokemon league stay where u are go sideways (right) then go into the deep hole keep goin till u find a little island get on it then walk upwards then u will find another island it has a huge rock then u will find a little strip of grass walk on it u will find shaymin walk past it then it will vanish BUT DONT GIVE UP get ur bike ride all the way up the path by the way the little strip of grass is seabreak path so go all the way up then u will find an island called flower paradise then walk up the stairs then there will be shaymi ALL READY TO CATCH i hope u the best of luck with dis im srry if it didnt work but it worked for me so happy catching best of luck to u all