"Ah!" Xiaoxia screamed, and sank into the sand with Guan Liyuan.

Guan Liyuan kept in mind that the more dangerous it was, the more he should not shout loudly, because shouting would only bring greater and more dangers!

Of course, Xiaoxia's voice soon stopped, because the two of them sank in an instant...

This soft sand was different from quicksand and swamps. It sank very quickly and immediately sealed Xiaoxia's mouth. Moreover, Guan Liyuan had no time to release the flying Pokémon... Besides, there were so many giant hornets, so he didn't dare to release them!

Guan Liyuan didn't understand the principle of this soft soil, and he didn't have time to think about it. He could only hold Xiaoxia's wrist tightly. Not long after, he felt a sense of weightlessness again. He fell five or six meters out of thin air and hit the ground hard... Sure enough,

in other worlds, with the body of an ordinary person, falling from such a height would most likely be injured, but now Guan Liyuan just felt that he was a little dizzy from the fall.

However, after the dizziness, there was a burst of darkness...

[Will he be blinded? According to the rules of this world, the injury should not be very serious... It doesn't make sense! 】

After Guan Liyuan's eyes adapted to the darkness, he gradually realized that it was not his vision that was wrong, but that the surroundings were too dark.

"It hurts..." Xiaoxia also woke up from a brief fainting.

"Depend on you! Charmander." Guan Liyuan took out the Poké Ball and released Charmander.

With the flame on Charmander's tail, he could immediately see the current situation...

For some reason, the two of them fell into an underground cave. What puzzled Guan Liyuan was that although there was some sand around him and Xiaoxia, the top of his head was still pitch black...

If it was a landslide, there should be a hole above now?

"It hurts..." Xiaoxia spoke again.

"Are you sprained? I have medicine here."

"You pinched my hand so much!"

"..." Guan Liyuan finally realized that he had not let go of Xiaoxia's hand to prevent the two from getting separated.

Xiaoxia rubbed her wrist and looked up.

Guan Liyuan thought she was also wondering about this phenomenon, but she muttered, "Is this... the seesaw rock formation formed by Diglett's digging?"

"Seesaw rock formation? What is that?" Guan Liyuan asked in confusion.

"When Diglett, Sandshrew and other burrowing Pokémon are digging holes, they will change the structure of the rocks and soil underground. The seesaw rock formation is one of them. After this special geological structure is formed, two rock bodies are formed under the soil that can only move downward or reset horizontally, like a seesaw. The soft floating soil is covered on top, forming this kind of environment that can be directly entered from above, but is not exposed to the sky..."

With Xiaoxia's explanation, Guan Liyuan gradually understood that Pokémon have a ground-based skill called "Digging", which is an attack skill in which Pokémon quickly drills into the ground and then suddenly jumps out from under the opponent's feet.

Many non-ground-type Pokémon can also learn this move, such as Charmander and Squirtle, which can learn this skill later...

But when ordinary Pokémon use digging, it is just an ability that allows Pokémon to quickly travel underground in a short period of time, which is equivalent to borrowing a path from the earth. After the use, the passage will collapse to its original state in a short time.

However, Pokémon such as Digger and Sandshrew use "dig holes" as a survival skill. When they use "dig holes" in life, the effect is different from that in battle. In addition to quickly drilling into the ground, it will also change the geological structure and form a semi-permanent ground!

"In other words... Is this a 'Digger Hole'? Has it spread here?" Guan Liyuan said with a headache.

"Digger Holes" refers to large caves opened up underground by a large number of Pokémon tribes that are mainly Diggers and like underground environments in the areas of Nibi City and Cerulean City.

The reason why Guan Liyuan has a headache is that there is no map for "Digger Holes"!

Because the terrain of the "Mole Hole" is changing all the time, some places where Pokémon that have not burrowed for a long time will gradually collapse, and the moles will continue to expand the scope of new "Mole Holes"...

For example, Guan Liyuan looked at the introduction in the illustration book, and the scope of the "Mole Hole" had not yet spread to the Evergreen Forest.

"Let's measure the area of ​​the seesaw rock layer above our heads first! If it's not big, use Butterfree and overturn the seesaw, and then take us out." Xiaoxia suggested.

"The only way..."

The two of them said, and decided to hide a little under the illumination of Charmander's tail, otherwise they would be buried by the sand on top if they really broke the seesaw rock layer in a while!

Although the natural environment in the Pokémon world is not easy to cause death, you will die if you commit suicide...

Who knew that the two had just taken a few steps, and Charmander suddenly "cackled" to warn!

"Charmander, what's wrong?" Guan Liyuan immediately put his hand on the top of Charmander.

[There are... a large group of wild Pokémon approaching...]

"What? It can't be those giant Beedrills catching up? No... this sound is..."

Guan Liyuan and Xiaoxia heard the sound of flapping wings again, but this time it was not the sound of insects flapping their wings, but...

"It's Zubat! They also like underground environments and live in groups in the 'Mole Holes'!" Xiaoxia said anxiously.

The Mole Holes are not only home to Moles and Sandshrews, but also Pokémon that like the dark underground.

"Run!"

"Ah? You're running again... Ah! Wait for me!"

Guan Liyuan and Xiaoxia entered the escape time again, and the terrain of the "Mole Holes" was complicated. The two of them went back and forth, and they didn't know how long they had been running. Finally, they found a crack in the rock wall. After squeezing in, they escaped from the pursuit of Zubat.

"Hey! Move back a little..."

"There's a wall behind..."

"Then stop rubbing!"

"I'm trying to see if I can move back a little more..."

"Okay, that's it, don't move!"

The two of them were squeezed face to face in a crack as wide as a person. Xiaoxia turned her head to the side. Because it was too dark around them, Guan Liyuan couldn't see her expression...