During your post-game quest, go to the Dreamyard and through the underground interior. Every Friday, a special Musharna is underground. Save your game before you interact with it. Musharna is on Level 50. Unlike original ones, this one has a special ability called Telepathy, an ability that prevents damage from teammates during double or triple battles. ... https://www.youtube.com/watch?v=bCGndGHVS0Y

After your quest at the Distortion World, return to Lake Verity and go into its cavern. After you interact with Mesprit, it will ward off and roam all over the Sinnoh region. Use the Marking Map on the Pokétch to track the areas of roaming Pokémon. Once you’re at the area where a boss symbol is marked, you’ll encounter the roaming Pokémon. Mesprit is on Level 50. Remember, roaming Pokémon flee on the first turn. If you still have the Master Ball, it would be the time to use it. Otherwise, have a Pokémon that knows Mean Look then use Dusk Balls when battling at night. ... https://www.youtube.com/watch?v=zzosMFEpk04

As you cross the bridges, Bago-Bagos will start popping up. Collect the Rupees as you cross over and you may want to use a spring to cross over at one stint. Once you navigate the path, scale the stairway to reach the flagpole. ... https://www.youtube.com/watch?v=0wAE5hTuMGk

The stage begins with frogs spitting out smaller frogs. When you descend, you’ll encounter spiked crown crabs. Descend again and you’ll see spikes. Continue descending and you’ll see some sea worms. Up ahead, a big lantern fish releases sea worms. The weak spot of the big lantern fish is its lantern on the head. As you navigate the waterfall section, crabs will descend. Enter the cap doors and you’ll battle against Bubble Man. Bubble Man will release a barrage of pellets and bubbles. Be careful not to jump too high as there are spikes in the ceiling. Using the Metal Blade will deal a great amount of damage. Defeat Bubble Man and you’ll receive the Bubble Lead. ... https://www.youtube.com/watch?v=123yDnp0UeI