McDonald's

McDonald's is a popular fast-food restaurant company seen often with the Sonic series. When referring to promotional items, they are the opposition to Burger King's Nintendo toylines.

Video Games
Around the release of Sonic Adventure 2, McDonald's released a set of handheld games made by Sega featuring 2 with Sonic (one had him in the Green Hill Zone), one of Knuckles, one of Shadow, one of AiAi, and one of Tails. Another set was released almost at the launch of Sonic Heroes featuring every playable character but the Chaotix.

Sonic X
A while after Sonic X appeared on US shores, McDonald's gave out toys (that look like the only official Japanese toys for the show with few exceptions) for the series in their children's meals (Happy Meal and Mighty Kids Meal). The Japanese Series 2 also shows Chris and Frances working at a WacDnalds, a famous anime parody of McDonald's.