After getting all 8 badges, try climbing the waterfall at Mt. Mortar so you can go deeper into the cave. In a lengthy maze of the B1F, you’ll spot some Black Belt training, who reveals himself to be the Karate King. Hitmonlee will use its Jump Kicks to cause great damage, although it will hurt itself if the move misses. Hitmonchan will strike first with Mach Punch and use the 3 elemental punching moves. After the battle, Kiyo will offer you a Tyrogue. ... https://www.youtube.com/watch?v=UGLWwb0rGBI
After you find the 6th Star Piece, the Axem Rangers will steal it, and you must pursue them until you reach the summit of the volcano. Axel Pink will summon a petal blizzard and cast a recovery spell to restore health fir itself or for its entire team, so go after the pink one first. Axem Black will throw bombs to attack. Axem Red will give vigor to its teammates to power up their offensive stats. Axem Yellow will spray bubbles and perform body slams on the opponent. Axem Green can summon meteors and thunderbolts plus perform an elegy lullaby to mute the target, denying it any use of special moves. The Blade will execute a breaker beam that strikes all opponents in range. When the head of the Blade is defeated, the battle ends, and the ship will fall. Afterwards, you’ll receive the 6th Star Piece for real this time.
...
https://www.youtube.com/watch?v=3z8TNb4R1M4
Navigate the exterior part of the tower and approach the statue to battle against the Demon. It has a variety of moves, especially for casting the southern cross, summoning flare stars, a meteor shower, and blasting a wave cannon, all of which can strike your entire team. It is weak against poison spells. Defeat it and the statue will dissipate, allowing you to go deeper into the dungeon.
...
https://www.youtube.com/watch?v=D816zUgERIw
After stopping Team Rocket in a mysterious hideout below the shop in Mahogany Town, you’ll now be able to access the gym in Mahogany Town. This gym has icy floors that cause the person to skate until touching a clean floor. You’ll battle some trainers as you skate. Navigate the floors and you’ll battle the gym leader. Pryce uses Ice type Pokémon. Seel and Dewgong will use Headbutt to sometimes make targets flinch. They will even use Rest to fully recover when running out of HP. Piloswine will use Blizzard to cause massive damage and even freeze targets. After winning, you’ll receive the Glacier Badge and a TM16 (Icy Wind). Icy Wind causes damage and lowers the target’s Speed stat.
...
https://www.youtube.com/watch?v=Pp39K_mR4MQ
Once you reach the Pokémon Center after Victory Road, and if you are about to approach the Elite Four, your rival will show up and battle you for the 5th time. For this round, his Munchlax and all other Pokémon have fully evolved. After the battle, heal your team and challenge the Elite Four.
...
https://www.youtube.com/watch?v=aNSd2RHY0aQ
After exiting the starting cave, you’ll see big birds dropping Bob-ombs as well as a Shy Guy riding an ostrich. Enter the building where you’ll see Ninjis and Sparks in the starting hall. Enter the door on the platform and ascend by pipes releasing Shy Guys. Go to the top to enter the card key room. Go back to the beginning hall with the card key and unlock the door. Ascend in a room full of Sparks on platforms and use the next door to ascend by some Goombas. Climb the chains by 2 Pansers and enter the next door by a Snifit. The next room has even more Sparks and dodging them can be tricky. You’ll find a POW Block after picking up a vegetable to get rid of the Sparks so you can ascend easier. Climb the ladder and find the door to the top of the tower. After 5 Ninjis, grab the jewel to open the Mask Gate. In the boss room, you’ll battle Mouser again. Throw bombs to attack Mouser, and, after 5 hits, the door to the next world will appear.
...
https://www.youtube.com/watch?v=MBYfBiszVbA
If you stomp a Wiggler, it will turn red and angry going faster. The first Yoshi Coin is hidden behind a tree. Up ahead, you’ll see some red Koopas, Goombas, Paragoombas, and more Wigglers. The 2nd Yoshi Coin is by a set of music note blocks, but you’ll have to use a spring to get it. The 3rd Yoshi Coin is by a set of trees. After touching the checkpoint, you’ll see a clear block with an item shuffle. Blocks release enemies so be prepared for that as well. The 4th Yoshi Coin is over the wooden bridge. After crossing a wooden bridge, grab the 5th Yoshi Coin by an Amazing Flyin’ Hammer Bro. Knock off an Amazing Flyin’ Hammer Bro to board its platform and go to the goal.
...
https://www.youtube.com/watch?v=da6xf_8Qy3g
After beating the female admin, you’ll now battle the male admin, whom is identified to be Archer. Golbat will use Confuse Ray to confuse targets and Air Cutter for critical hits. Weezing will use Thunderbolt to paralyze targets and Explosion when running out of HP. Houndoom will use Flamethrower to burn targets and Crunch to lower their Special Defense stat. After the battle, this admin will disband Team Rocket but vows to make a comeback in the future.
...
https://www.youtube.com/watch?v=QmhjT0sxo00
Go north from Mahogany Town and you’ll find a place called the Lake of Rage. Once there, use Surf and you’ll find a Gyarados bearing a different color from all others. Save your game before you interact with it. Gyarados is on Level 30. Net Balls would be the best choice to catch it since it is Water type. After catching it, you’ll receive a Red Scale, and Lance will come by to witness the scene.
...
https://www.youtube.com/watch?v=C-bO4BTeI88