Like their mainstream counterpart, Classic Yoyo are shown to be quite friendly, playful and funny towards their friends. It is emphasized in "Les Pyjamasques et le croque-chaussettes" that Classic Yoyo will tell lies and forgets about the Night of the Black Moon.
Classic Yoyo is identical to his mainstream counterpart, but he appears more chubbier, has a fatter tail with the addition of white paws and feet at his suit. Another difference is that the bottom of his eyes are square shaped like Catboy which is slightly-cross eyed, has visible rosy cheeks on his face, his mouth is noticeably smaller, and has more tan skin tone than the mainstream counterpart.
However, starting in "Les Pyjamasques et la soupe à la citrouille", his eyes became more rounder and his eye pupils are bigger and oval-shaped. Then in "Les Pyjamasques et le croque-chaussettes", his rosy cheeks were removed has a slightly lighter skin tone. And finally in "Les Pyjamasques et Energuman", his look has been redrawn to match the appearance of his american counterpart, his tail is made thin, and his ears become pointy and slightly bigger.
It is also presumed that Classic Yoyo is pint-sized rather being the size of an average seven years old.
Powers and Abilities
Yoyo Acrobasaut: Can jump really high, but the power was unnamed in the classic universe of the Pyjamasques books.
Yoyo Rapido-saut: (officially introduced in "Les Pyjamasques et le sablotin"): Can leap at a fast time, but the power was unnamed in the classic universe of the Pyjamasques books.
Yoyo Rapido: (officially introduced in "Les Pyjamasques et le sablotin"): He can't run at lightning speed, but it allows him to react to things at the fastest time such as catching Sablotin's metal moons for example. However, the power was unnamed in the classic universe of the Pyjamasques books.