Togepi

Togepi is a small, light-yellow Pokémon with a rounded, egg-shaped body. After hatching from its Egg, Togepi's body remains encased in its eggshell. That shell has a white base color, and rounded, mostly unfilled shapes (with thick borders that are either red or blue) dot the shell on all sides. Sticking out of its shell, Togepi has stubby, rounded cone arms and round feet with two toes each. Togepi has thin, black, oval eyes with thin, black arcs on their outer sides. Its head has five round-tipped, conical spikes that seem to form a crown. It also has semi-oval, brown pads on the soles of its feet.

The Pokémon the Series episode The Case of the K-9 Caper! (EP054) showed that it can retract into its shell, which it usually does to sleep, and as mentioned in Pokémon Sleep, Togepi is known to roll around in its shell while sleeping. It is able to siphon the positive energy of others, storing that happiness in its shell, and then release it to those in need of it. Early TCG cards state that Togepi is able to release poison from the spikes on its head, which it uses to chase away enemies. It has a very joyful nature. As a result, it is said that it shares its joy with those who take care of it. Because of its disposition, Togepi is seen as a sign of good luck, especially if a Trainer is capable of getting a sleeping Togepi to stand. Togepi's innocent smile is said to calm the soul. It is also shown in the Pokémon the Series: Diamond and Pearl episode Where No Togepi Has Gone Before! (DP142) that Togepi can act very maliciously at times, causing havoc and bad luck to its enemies. In the Pokémon the Series: Ruby and Sapphire episode A Togepi Mirage! (AG045), it is shown that, when necessary, Togepi can fly or levitate despite lacking wings. Togepi are born within the Togepi Paradise, and appear to humans to spread kindness – it is rare in the wild, but can most commonly be found in forests. After its mission of spreading kindness is complete, it will eventually return to the Togepi Paradise.

Evolution
Togepi evolves into Togetic, which evolves into Togekiss.

(Source: Bulbapedia)