Once you have the HM03 (Surf), you can Surf on water. Try doing this in the Pinwheel Forest for example. On the eastern side of the woods, go deeper into the forest and you’ll find Virizion. Save your game before you interact. Virizion is on Level 42. Its signature move is Sacred Sword, a Fighting type move that deals damage regardless of the target’s stat changes. Ultra Balls would be recommended or wait at night to use Dusk Balls. Furthermore, don’t attack Virizion with any Dark type move or else its Attack stat will raise with the Justified ability. ... https://www.youtube.com/watch?v=MQyXsyvFKxs

In this underground level, cross a big hole and you’ll encounter 3 Goombas in a garbage block tunnel. Hit invisible blocks and the garbage block above them to reveal a vine that will take you to a Warp Zone so you can go to either World 6, 7, or 8. If you’re still underground, you can go down one pipe for coins or continue ahead by crossing platforms going down. Continue ahead and you’ll see a Buzzy Beetle. A Buzzy Beetle cannot be harmed by fireballs. After 2 Koopas under a set of garbage blocks, you can stay above ceiling to go the Warp Zone that leads to World 5 or use the pipe by the wall to return to the surface so you can use the big stairway that leads to the flagpole. ... https://www.youtube.com/watch?v=gLkyK8sEipk