Ash's Torkoal (Aura)

Ash's Torkoal was the fourth Pokémon caught by Ash Calem Ketchum during his travels through Hoenn.

Personality and characteristics
Torkoal has a habit of crying and releasing smoke from its nostrils and back when it is happy. It will usually do this every time it's released from its Poké Ball and when it wins a battle. Although not ill-intended, the smoke will usually blacken any surrounding object or person. This was demonstrated relatively often when Torkoal was first captured.

Ash's Torkoal, as Sally points out, is quite an emotional individual and very friendly towards people and other Pokémon. It has a slight comic element to it.