You have to up its happiness points to 250 or more,then level it up.
Happiness Methods:
Haircut guy in goldenrod city
Pokemon Massage in Pallet town
etc.
Chat with our AI personalities
For a togepi to evolve you need to give it 220 happiness
its spelt togepi so if you want the answer tupe this in your search bar: When does togepi evolve
Togepi does not evolve at a certain level. If Togepi's happiness/friendship towards the player is at, or close to maximum, and it levels up, it will evolve into a Togetic.
Yes Togepi does evolve in Pokémon SoulSilver. It does evolve, but instead of evolving by levels, it evolves by happiness, which happens in every other Pokemon game with Togepi
To evolve Togepi, you need to make it have the highest possible friendship. Friendship points are gained when you walk with Togepi in your pack, make Togepi grow levels, or give Togepi items. Once it's friendship level is maxed out, make it grow a level and it will evolve into Togetic. You can make Togetic evolve by giving it a shiny stone on it. It will evolve into Togekiss.