There should be a Team Rocket Grunt standing in front of a poster near the top right-hand corner of the casino, battle him, then he'll move away from the poster. Go up to it and press A, a stairway should open up leading to the team rocket base. Hope this helps :)
Celadon Game Corner.
Celadon city, in the game room.
TM10 Hidden Power is located at the Lake of Rage, or you can acquire it from the Celadon City Game Corner as a prize.
In Pokémon Ash Gray, you can obtain an Everstone by exploring the area around the Rock Tunnel. Specifically, you should search for a hidden item on the ground near the entrance. Additionally, you can find it in the Celadon Department Store, where it is available for purchase. Be sure to check every nook and cranny, as hidden items can often be easy to overlook.
you can get it from a guy called riley in front of the entrance to iron island
The secret entrance is at against north side of Route 206. It is hidden underneath the center of the bicycling road.
it is hidden in route 20 near the entrance to seafoam islands
There is a hidden entrance directly under cycling road west of the main Wayward Cave entrance. In D/P (but not in Platinum), strenght is required to enter this area.
In Pokémon Red, you can obtain the Scope in Celadon City from the Celadon Department Store. Specifically, you need to head to the store's fourth floor and speak to a man who will give you the Scope as a gift. This item is useful for identifying hidden items and Pokémon, helping you navigate through the game more effectively.
I think it's the Silph Scope that you need for Lavender Town and it's in the hidden Team Rocket base in the Celadon Game corner on the 4th Floor and Giovanni has it.
first of all, you need to get 6 oddish.. then, go to celadon city. next, talk to erika and she will escort you to the hidden part of her gym.. celebi will be there
first you get hm flash then you have to go around the cave from the outside then go inside the the hidden entrance from the back