From Sonic Retro

Unleashed dev 063.jpg

Wentos (ウェントス Uentosu) is a human travelling salesman encountered by Sonic the Hedgehog and Chip in Sonic Unleashed. He wears an olive green coat and hat, and is always seen carrying a suitcase in one hand and a chao puppet on the other.

Wentos can be encountered in the game's hubworld sections, and sells the player a variety of items which are unobtainable from normal shops. When speaking to the player directly, Wentos seems painfully shy, but when the chao puppet takes over the sales talk, it comes across as an extremely competent merchant. Unlike other merchants in the game, Wentos' prices fluctuate wildly at every appearance, so make sure you snap up a good deal as soon as you see it.

In the credits, there are two photos of Chip playing with Wentos's Chao puppet.