This is gonna sound silly, but at the 'Hall Of Memories' Mr. Fuji is there, Right?
And I talk with one of the people in there and she says

"There are other resting places of Pokémon here, I think.

There are many chambers that only Mr. Fuji may enter."

Could this be some sort of event and/or unlockable?

Cause Mr. Fuji say:
"Welcome...

Hmm... You appear to be raising you Pokémon in a kind and loving manner.

Those who love Pokémon come here to pay their respects to Pokémon.

Please pay homage to the spirites of Pokémon.

I'm sure that will make them happy."

And seeing as nothing special really happens in Lavender Town is there a possibility of an event?
Anyone shed light on my quandry?

see, i had the same thought. why would they mention that there's only certain chambers that mr fuji can enter, if you can't get in there somehow?? unless it's just one of those random sentences, which is kinda rare/stupid.

I've never known them to do any 'stupid sentences' so I'm thinking could it be a watch this space thing?
Cause the radio tower is off limits also, in fact Lavender Town is pretty darn useless...

Lavender Town's only purpose in the 2nd and 4th Gen games is to get the EXPN card. And in HGSS, you only use that to get Snorlax to wake up.