If you have a special event Celebi taking the lead of your team, go to the Ilex Forest. Interact with the shrine and Ethan or Lyra will arrive to see what’s going on. Celebi will travel back in time and you’ll find yourself at an unknown spot, where a little boy in red hair is having an argument with Giovanni. After the boy in red hair takes off, Celebi will teleport you to a cave of some sort, where Giovanni is confined and listening to a broadcast on the radio, explaining that Team Rocket has taken over the Radio Tower in Goldenrod City. After a brief conversation, you’ll have a battle with Giovanni. Nidoking will use Focus Energy to boost its critical hit ratio, which will make Shadow Claw more easily deal a critical hit. Kangaskhan will use Dizzy Punch for a 20% chance of confusing the target and Sucker Punch to strike first. Honchkrow will use Swagger to confuse the target and Dark Pulse for a 20% chance of making the target flinch. Nidoqueen will use Earth Power for a 10% chance of lowering the target’s Special Defense stat and Superpower to deal great damage but lower the user’s own Attack and Defense stats. After the battle, Giovanni will leave, and you’ll be warped back to the Ilex Forest in the present time. ... https://www.youtube.com/watch?v=6_o8JP1G9ME

Mauville City’s gym has electric barriers that adjust when you press the switches. Make your way through and you’ll battle the gym leader. Wattson uses Electric type Pokémon. Using Ground and Grass types work best. Voltorb will use Rollout that gets stronger every turn for up to 5 turns. Magnemite and Magneton will use Supersonic then Sonicboom in case of anyone who has an advantage over them. After the battle, you’ll receive the Dynamo Badge and a TM34 (Shock Wave). Shock Wave is a special Electric type move that is guaranteed to strike without fail. ... https://www.youtube.com/watch?v=DllNAQEj2fk

In this level, you’ll take a pipe to go underground. There are 2 Goombas under a set of ? Blocks at the beginning. Between sets of hard walls is a garbage block containing multiple coins. Go by some Koopas and Goombas then you’ll see Piranha Plants lurking from the pipes. Go down one of the pipes to enter a bonus room for more coins. Go back up and you’ll see 2 Goombas coming down the stairway. Between platforms going up and down is a landing with a red Koopa. Unlike the green ones, the red Koopas don’t fall off edges. If you go above the ceiling, you’ll enter the Warp Zone that has pipes to go to Worlds 2, 3, and 4. If you stay on the ground, go through the pipe by the wall to return to the surface and climb the big stairway to reach the flagpole. ... https://www.youtube.com/watch?v=LlgeuequpH4

The level is the same design as World 2-4, but this time, a longer rope bar with lurking fireballs is at the start. The rest of the blanks have been filled with rope bars. When you see fire incoming, a rope bar spins fast by 6 coins. Once you reach the drawbridge, you’ll battle Bowser again. Touch the cactus to finish and a villager will explain that the princess is at another castle. ... https://www.youtube.com/watch?v=qPAn6BaOmR8