Go up the ladder next to the Pokémon Center, you'll run into a girl inside the treehouse who wants a Pikachu.
In the next building to the right, an old woman will check your Pokémon for Hidden Power. She'll ask you to guess which hand she holds a coin in. If you choose correctly all three times, she'll give you TM 10 (Hidden Power).
Shop
Continuing down, you'll see a Shop on a tree. The right side sells chairs:
This gym can't be reached upon first arrival of the city. An invisible barrier blocks the player from walking to the gym's door. To get past this, one must collect the Devon Scope from Steve on Route 120.
Winona has a mixed bag of birds, so just an Electric or Rock Pokémon can't beat her. Roast Skarmory with a fire type attack. Ice Beam alone won't work since Skarmory and Pelipper are not weak against Ice type.
The biggest ordeal is Altaria, which is not weak to electricity. Remember that Altaria usually uses the Dragon Dance move twice before using its deadly Earthquake. So send out a bird at the right time and it will survive the quake. Winona will keep feeding it Hyper Potions to prolong the battle, but she is unlikely to cure any status problems. So, poison or burn Altaria and the Gym will surrender.
