Go to Route 103 and you’ll meet Brendan or May. You’ll battle the opposite protagonist for the first time and the opposing starter Pokémon has an advantage over yours. After the battle, go back to Professor Birch’s lab for the Pokédex. ... https://www.youtube.com/watch?v=1cv_DhsoeLI

Complete Area 3 of the White Treehollow and you’ll take on Carleigh, who is originally a Ranger. Stoutland will use Work Up to raise its power along with 2 reckless attacks that gives the user damage while attacking. Leavanny will use Swords Dance to raise its Attack stat and Leaf Storm to deliver a strong attack at the cost of its own Special Attack stat. Emolga will use Thunder to paralyze opponents and make them flinch using Air Slash. After the battle, you’ll unlock Area 4. ... https://www.youtube.com/watch?v=OuU6y8c1oiQ

During your post-game quest, go back to Undella Town and you’ll see Hugh there. Talk to him and he will give you an HM06 (Dive). After that, you can then battle him for the 6th time. New to his team are Flygon and Eelektross. Flygon will use Stone Edge for extra chances of critical hits. Eelektross will use Flamethrower in case any Grass types are on the field. After the battle, Hugh will go to the safehouse in Driftveil City. Zinzolin will then show up to give you paperwork that Ghetsis left behind so you can read and decipher the markings as you explore the Abyssal Ruins. ... https://www.youtube.com/watch?v=NLoBYx4tRi8

In Area 1, you’ll see 3 Goombas and cross lava with a platform. At the next landing, go down the pipe. In Area 2, you’ll see Buzzy Beetles and Paratroopas. Hit an invisible block by a pipe by a platform so you can reach it and go through. In Area 3, fish will be jumping by. Cross a small pit of lava and enter the pipe. In Area 4, you’ll be underwater. Pass some Bloopers and fire bars to use the pipe at the dead end. In Area 5, pass a Hammer Bro and jump over a lava pit. With fire incoming, you’ll reach the drawbridge to battle Bowser one more time. Bowser will throw hammers and shoot fire. Touch the axe to drop the bridge and you’ll rescue the princess to finish your adventure. ... https://www.youtube.com/watch?v=h11JjfBr_S4