Nintendo has just finished its Pokémon event at the gaming expo E3. During the gameplay, two new Pokémon were revealed!

Yungoos and Pikipek wild encounter in Sun/Moon
Yungoos is Normal type and is based on a mongoose. It is apparently always hungry, which makes it angry. Pikipek is Normal/Flying and is based on a woodpecker. It can peck 16 times a second.
Various other details were also shown during gameplay. See below for details and screenshots.