Grover lives in the Kanto region near Mt. Moon. He knew
Professor Cerise as a young boy.
Chloe Cerise was introduced to him and he realized how fast time had gone by as he recalled her father was amazed with all the plants, trees and Pokémon just like she was.
Grover remembered the time when they nursed an injured Clefairy back to health as it had hurt its leg after being chased by a Beedrill.