I was out of money buying a lot of things and tried to use the [highlight=blue]Subway in Kanto and it worked without money[/highlight], i was with 800$ and it worked free.

I tested it in Johto but the NPC said i had no money so in [highlight=blue]Johto is working but in Kanto is bugged[/highlight].

I have not tested with the Kanto-Johto travel because I had the (100.000$ ticket free for 1 week or something like that) so it was free as expected.

(Subway costs 2,500$ every travel from Pokecenter to Pokecenter)

Actually I have enough money to travel but it's free in both Kanto and Johto, I don't know if the reason is the 100.000$ ticket Kanto-Johto travel.

When you have the "100k" ticket you dont have to pay for the Kanto to Kanto stationes. The policeman is telling you that aswell.

Yup if you buy the ticket its free for a week or so