After carefully considering your options, you think that walking to your headquarter is currently the more preferable choice. Besides the inherent risk of teleporting through unknown grounds, walking might just allow you to take in more of the gargantuan Lucario.
"I think that I want to stay on the safe side of things", you said, "You'll never know what will happen if you teleport without knowing your destination."
There was a brief silence, then Lucario spoke: "I understand what you mean......If that's the case, then take the original path back to my stomach, you should see another tunnel that leads up from there. By taking that tunnel, you should be able to reach the "headquarter" in no time. There will be many splits along the way, but the headquarter is at the very end of the tunnel which should be easy for you."
Being the curious person always are, You followed Lucario's instruction and made your way back to the vast stomach. Indeed, another tunnel is visible at the other end of the soft chamber. The only difference is that this seems to lead upward the body.
You walked toward the tunnel and started ascending it. The twists and turns of the passage disorients you, the softness of the ground made it even more of a challenge to properly scale your way through. For some odd reasons, the ground gradually resembles a long flight of stair the higher you went. You felt gushes of warm air as you continue to ascend the tunnel.
Somewhere at the midpoint of your trip upward, you begin to see splits along the way. Some of them are marked with simple pictograms. You recognized some of them as the lungs and heart. The rest of them makes no sense to you. Because you are exhausted from day's ordeal, you decided to explore them the next morning.
After a total of fifteen minutes, the tunnel seems to end at a larger area. You assumed that this is the headquarter Lucario mentioned. You entered the area and take the sight before you.
You are in a room-sized chamber that is blue and has a faint glowing aura to it. On one side of the chamber, there is a raised rectangle that is covered in what looks like fur. The colors on them match those of Lucario. It is big enough is fit you comfortably. You walked there and tried sitting on it. It's extremely soft and warm. This is when you noticed another thing across the chamber: a large viewing window. The elliptical opening is currently showing a beautiful star-filled sky. It must've gotten dark during my trip here. The shimmering amid the dark sky mesmerized you. Throughout your travel across the land, this is the first time you have seen this many stars appear all at once.
You moved toward the window, speechless........
"Enjoying the night sky like I do?", Lucario suddenly asked. The closeness of the voice surprises you.
"Where am I exactly?", you asked the Pokemon.
"You're in my head, silly", Lucario said with a chuckle. "I don't call it the "headquarter" without a reason. In case you're wondering, you are currently looking out from my left eye. Do you like the setup of the chamber?"
"Yes, of course!", you exclaimed.
"I'm glad that you like it, but I think maybe you should get some rest after such a long day.", Lucario said.
"You're right", you said as you lie down on the bed.
"Good Night, I hope that you have a nice dream. Tomorrow will be another adventurous day for you.", Lucario said softly.
You immediately feel drowsy as you adjusted yourself in the bed. Staring out the 'window' at the stars aided you and you fell into a deep sleep.......