Pero, Toei's Mascot.
Toei Animation Co., Ltd (東映アニメーション株式会社 Tōei Animēshon Kabushiki-gaisha) is an animation studio based in Japan and owned by Toei Company, Ltd. They are known for animating many American and Japanese cartoons, such as G.I. Joe, Devilman, The Transformers, Sailor Moon, Voltron (aka Golion), Tranzor Z (aka Mazinger Z), Getter Robo, Steel Jeeg, Grendizer, Daiku Maryu Gaiking, the Dragonball franchise, One Piece, Digimon, The Real Ghostbusters, Zatch Bell, Bobobo-bo-Bobobo, the original Teenage Mutant Ninja Turtles, Spider-Man and his Amazing Friends, Pryde of the X-Men, Kinnikuman... look, it might just be shorter to list the stuff they haven't worked on.