Bill's House

Before you make it through the door of Bill's house, some guy stops you-Great, another battle?

..No, he's offering to sell you some tickets for a ship called S.S.Anne. Guess he's been watching you battle, and thinks you're good enough to get on.

Well, your choice to buy them or not!

Once inside Bill's house, you can either chat with him a while (Which will inevitably lead up to seeing his pokemon) or just ask to see them from the start. It isn't rude, merely time-saving. Really.