Battle Pike

The Battle Pike is a long pike in the design of a Seviper. Inside of it are 21 rooms, in seven sets of three. The player may choose any of the three in a set to continue through, and in each of the three, any of the following eight events may occur:
 * Single battle: 3 Pokémon per side.
 * Double battle: 2 Pokémon per side.
 * Single battle and healing: 3 Pokémon per side; winner's Pokémon are completely healed.
 * Wild Pokémon: wild Milotic, Dusclops, Wobbuffet, Breloom, Electrode, or Seviper appear.
 * No event: Nothing happens.
 * Status effect: A surprise attack will inflict a status on one or more of a player's Pokémon. The status includes Kirlia's burn, paralysis, poison, or sleep and Dusclops's burn or freeze.
 * One or two recovery: One or two of the player's Pokémon will be healed.
 * Full recovery: All of the player's Pokémon will be healed.

The lady standing outside of the rooms will hint at what is in one of the three rooms:

"For some reason, I feel a wave of nostalgia coming from it..." There may be an old man who will heal the player's Pokémon, "nostalgic" because he misses his youth, a Pokémon that will affect party Pokémon with a status condition, or wild Pokémon missing their homes.

The Frontier Brain of the Battle Pike is Pike Queen Lucy. She challenges trainers who complete 27 rooms (two passes through the pike) and 139 rooms (10 passes). By beating her, one is awarded with the Luck Symbol.

The Battle Pike is located near Fuchsia City, and Ash challenged it as his fourth facility.