I found this hack the other day lurking around, and I must say, it is a very good one. The version I'm playing is the 2009 beta. I don't know if there are any newer ones.
I don't know if this is supposed to be like this, but I think it shouldn't...
The woman just north of Mt. Boulder, the one past the Kirby-obsessed dude, gives you a Water Stone after you've beaten Karpman.
The thing is... If you exit the screen, and enter again (like, a new name appears on the top left corner), or enter a building, she would give you the stone again and again, ad infinitum. Thought I should report it
Wonderful hack, btw. =)
Also, it seems to be a typo on the attacks. My Growlithe just learned 'Odor Slueth', instead of Odor Sleuth.