While Julian was talking with Alder, Gengar is also having another one of his adventures, as he left Julian's side he started to roam around the tower, he could sense the door to the dimension somewhere but he couldn't find the exact location.
So he was roaming around to find that single strand that stands out better than other so he can follow it to this door, as he floated around he saw many ghost type pokemons, there were so many ghost type pokemons here and he was surprised by the very thing ghostly aura around this tower.
What he also noticed that this aura is actually not because of all the dead pokemons, yes they could create a very ghostly environment but this aura was too thick, this aura was clearly from that door Gengar is looking for.
After looking around the tower, Gengar finally came across a thin strand that stood out better than others and he quickly latched onto it, he soon followed the strand which led him below the tower.
He was surprised by this because Gengar didn't expect another open space below here because there seems to be no door leading down here, the walls around here are thickly covered by concrete and metal.
Whoever built this tower, built it on purpose, to make sure that no human comes here, he looked around and saw that some ghost type pokemon have found their way till here but they can't seem to get past the thing that is actually blocking them from entering.
Gengar looked at the door, a spiraling portal that is made of ghostly energy but it seems like it is repealing anyone that is trying to get close to it.
He saw a Haunter trying to get in but as soon it at got close, it got blasted away, the Haunter was actually a strong one, it could easily take on a gym leader and it is still not on its final evolution and it is already this strong but still not able to get past this door.
The reason it's so strong is because of this aura that covers the whole tower and every ghost type pokemon here seems to be eager to get inside this door but one has to be very strong to get in.
Gengar didn't wait around and headed directly towards the spiraling door, the spiraling door tried to repel him but the force was too weak to even slow him down, he just went right through the barrier creating a hole, suddenly many ghost type pokemons followed after him when they saw the hole in the barrier.
The fastest ones were able to get past the hole while the slower ones were repelled again as the hole got itself fixed in an instant.
Gengar entered the spiraling door and into the dimension, as he got to the other end he was surprised by the environment in front of him, this place is a paradise of ghost type pokemons, he could see ghost type pokemons everywhere.
From very strong to quite weak ghost pokemons were roaming around here, Gengar suddenly remembered about the ghost dimension that he visited in the past, where he dealt with that Froslass that was using other ghost-type pokemons to keep itself from disappearing.
This dimension is similar to the one he visited before, last time he entered that dimension he was not strong enough to sense the source of that dimension but this time it is different.
He could feel the source of this dimension this time, having broken through that level 100 limit was really helpful.
Gengar came out of his thought process and looked around the city, this dimension is not that different from the outside world, there are buildings that seems to be inspired by things from the outside world.
But the structures seem to be very old as well, they are not buildings of the modern world, they look very ancient with pointy room and walls made of stones compared to bricks that are used nowadays.
Gengar is surprised, he didn't expect to find another dimension similar to the one in the past, but this one is a little different, the aura is very strong and potent and the Ghost pokemons here are also benefiting a lot compared to the ones in the other dimension.
But this all didn't matter to Gengar, he is here to study and understand dimensions properly. If he is able to understand how this dimension was made, he will also be able to create elements and atoms to create things.
Right now, his dimension is just an empty space with floating chains made form his energy, it has no beginning and no end, to create something like this he needs more and now he has the chance.
Gengar landed on the solid ground and felt it, this ground had no energy in it, it means it was naturally created with atoms and molecules, not with ghostly energy, this is what Gengar is after.
Gengar [Gegege, I am going to have some fun here]
He laughed and walked with other pokemons to the middle of the dimension, he could sense the source of the dimension, it will take him some time but he will get there.
On his way, he saw many ghost type pokemons he has never seen before, some looked like lizards while others were stones possessed by ghosts and many more.
All of these pokemons were quite unique in their own way.