I found the O-Hatching Power if you need it:
I assumed you need to beat the E4 or Delta Episode (I've done both).
Go to Mauville Pokemon Center and there will be an old man at the back by the map.
Speak to him and choose anything and he gives you a few o-powers.
Leave the Pokemon Center
Lather rinse and repeat. More old men will take his place wearing 4 more different colored shirts. Once the final one in the red shirt is done, he invites you upstairs to his apartment.
Go to Mauville 2nd floor on the RIGHT hallway. Find a room with a man who says hes empty. Go across the hall to find the 5 old men and talk to th red shirt one. They want you to invite the other man over whos empty. Speak to the empty man again and a CS starts.
After it he BECOMES Mr Bonding and you get the hatch power.
I assumed you need to beat the E4 or Delta Episode (I've done both).
Go to Mauville Pokemon Center and there will be an old man at the back by the map.
Speak to him and choose anything and he gives you a few o-powers.
Leave the Pokemon Center
Lather rinse and repeat. More old men will take his place wearing 4 more different colored shirts. Once the final one in the red shirt is done, he invites you upstairs to his apartment.
Go to Mauville 2nd floor on the RIGHT hallway. Find a room with a man who says hes empty. Go across the hall to find the 5 old men and talk to th red shirt one. They want you to invite the other man over whos empty. Speak to the empty man again and a CS starts.
After it he BECOMES Mr Bonding and you get the hatch power.