Zavok

Zavok is a Zeti and the leader of the Deadly Six, the main antagonists of Sonic Lost World. When Dr. Eggman came to the Lost Hex, Zavok and the other members of the Deadly Six were forced into serving him, due to the effects of his Cacophonic Conch—however, after Sonic rashly got rid of the conch, the Deadly Six rebelled and took control of Eggman's forces.

Super Smash Bros. for Wii U
Zavok, along with Zazz and the rest of the Deadly Six, appears as part of a trophy in Super Smash Bros. for Wii U, which can be seen below.

Super Smash Bros. Ultimate
Although he doesn't appear directly in Super Smash Bros. Ultimate, Zavok is alluded to in Sonic's route (based off various Sonic the Hedgehog games) through the similar-looking Incineroar, which stands in for him in a fight in Windy Hill Zone.

Mario & Sonic at the Rio 2016 Olympic Games
Zavok makes an appearance as a playable character in Mario & Sonic at the Rio 2016 Olympic Games in the Boxing Event. This marks his first playable appearance.

Profile
''Zavok is the strongest of the sinister Zeti and the leader of the Deadly Six. As the last disciple of Master Zik, he's a certified force to be reckoned with. Along with his formidable physical prowess, a calm demeanor and penchant for quick-thinking makes his well-suited to leadership. His greatest joy is in improving his skills, which makes the straight-forward competitive nature of the Olympic Games quite appealing.''