Sentret

“A very cautious POKéMON, it raises itself up using its tail to get a better view of its surroundings.”

— Pokémon Gold

“It stands on its tail so it can see a long way. If it spots an enemy, it cries loudly to warn its kind.”

— Pokémon Silver

“When acting as a lookout, it warns others of danger by screeching and hitting the ground with its tail.”

— Pokémon Crystal