"!" appearing when talking to the Slowpoke in Fuschia City's zoo
"!" (also appearing in the Japanese versions) is placeholder text that appears in Pokémon Red, Blue and Yellow for when the player attempts to talk to the other player in the Cable Club room (either the Trade Center or the Colosseum), or one of the Pokémon in the Fuchsia City zoo through a walk through walls glitch or cheat.
In Generation III
This message also appears in the Generation III main series games when the player tries to examine a berry plant while the plant is changing its phase of growth.