Sentret was with the professor when the Totodile theft happened. It was also with the professor at the hospital, who was contacted by Gold. It was also present at the screen when the professor was contacted by his assistant about the egg.
Sentret and Joey listened to the Goldenrod Radio Station and were shocked to hear Gold bickering with Whitney. Sentret was with Elm, who contacted Gold about the egg, which hatched into a Togepi. Sentret, Joey and Elm were worried about Gold, who fought against the Masked Man. Elm warned Gold that the Masked Man was actually a strong trainer, whose mask was created by the same material as Gym Badges were.
After the Gym Leaders tournament, Elm, his assistant, Joey and their Pokémon listened to the radio broadcast and feared what happened to Gold.
None of Sentret's moves are known.