In Pokémon Red, Blue, and Yellow, as well as in Pokémon FireRed and LeafGreen, Daisy gives the player a Town Map (despite her brother telling her not to) if he or she visits her after receiving a starter Pokémon. She gives free grooming to one of the player's Pokémon in the Generation II games once per day between 3 and 4 PM, and in FireRed and LeafGreen every 500 steps once the player has entered the Hall of Fame.
Also in FireRed and LeafGreen, after the player has entered the Hall of Fame, Daisy will tell a player how happy their Pokémon are. She's well-known for being adored by all kinds of Pokémon. It is said that when she's around, even the most ferocious Pokémon calm down. Daisy enjoys tea every day, and buys hers from the Celadon Department Store. She's also a champion Pokémon Coordinator, having won the Spring Pokémon Contest some years back.
In Pokémon HeartGold and SoulSilver, she gives the player Blue's number so they can call and arrange a rematch with him at the Fighting Dojo in Saffron City. She will only share this once she has given seven groomings and been shown one Pokémon with maxed friendship.
Also returning from previous generations, Daisy, still located in her home of Pallet Town, will groom one of the player's Pokémon for free once daily between 3:01 and 4:00 PM. As in Generation II, it will raise a Pokémon's friendship greatly, but it will also raise the Pokémon's Contest condition by 32 Beauty and 22 sheen. This is not displayed anywhere in-game, and the Pokémon must be seen from the point of view of Diamond, Pearl, or Platinum to notice. Despite this, Feebas whose Beauty is maxed out this way can evolve into Milotic.