The Altering Cave in Pokémon Firered has an interesting gimmick that involved using the mystery gift event feature to change the zubats in the cave into different Pokémon from Gold and Silver. Sadly, no country outside of Japan ever held the events needed to change the zubats so it became a Japanese-only feature.
altering cave,
Nothing but Zubat.
You can catch a Houndour in the Altering Cave in Pokemon FireRed.
The only Pokemon you can catch is Zubat.(talk about a let down)
In Altering Cave all you find are Zubats. The only way to get rare Pokemon from it is to use mystery gift but I think the event has passed so at this point it is pretty useless.
Probably.
Zubat can be encountered in the Altering Cave. Originally, there was going to be a set Mystery Gifts distributed which could change which pokemon were encountered in the Altering Cave, but the Mystery Gifts were never distributed.
There is no altering cave in pookemon red since the sevii islands don't exist in Pokemon red only in Pokemon firered and leafgreen in six island after going past the forest and the altering cave is also in Pokemon emerald in route 103 a cave appears after beating the elite 4.
You can't do anything with altering cave unless you have an E Reader.
Nothing.
Zubat.
North in six island.