Hatching from an egg that Ash found, Togepi immediately imprinted Misty as it's mother even though Ash earned possession of it through a small tournement. Togepi was not an attacking Pokémon but secretly it knew and used Metronome to protect itself and Misty. Personality Wise, it still has the mindset of a child, liking to wander off and play. However it started to show its aggressive side when General Hansen started attacking the Mirage Kingdom. It evolved to stop him.
After evolving from Togepi, Togetic had a very brief tenure with Misty. It managed to protect a group of Togepi from General Hansen. After doing so, it reluctantly decided to go to the Mirage Kingdom to protect the Togepi left in it from any further excursions.