I Surfed across Sootopolis City's lake and I shopped for items at the nearby Poke Mart there and I wandered north up some steps and I soon saw Steven again with Gym Leader Wallace. We talked and I arrived at the entrance of the Cave of Origin. Archie, Maxie and Tabitha were there and Brendan showed up as well before I went into the cavern to stop Groudon from destroying all life in Hoenn. I used a Max Repel to avoid wild Pokemon and then I reached the bottom floor of the Cave of Origin and changed into my Magma Suit and walked above the molten rock on top of Groudon and reached an area where Groudon went through Primal Reversion. I had to battle Primal Groudon afterwards to save Hoenn.