Carl's Jr.

Carl's Jr. is an American fast-food restaurant and has done promotions with the Sonic the Hedgehog series in the past. Carl's Jr. was founded by Carl Karcher and his wife Margaret Karcher in Los Angeles in 1941, but the brand was only a hotdog cart at the time. Later in 1945 they opened the first Carl's Drive-In Barbecue, then eventually in 1956 opened the first two Carl's Jr. restaurants.

Sonic the Hedgehog and Pals Mini-Viewer (1996)
In 1996, Carl's Jr. did a promotion with the Sonic series for their kids meals. The promotion consisted of four Sonic the Hedgehog Toys of "mini-viewers", which were based on the View-Master. The four available viewers were Sonic, Tails, Dr. Robotnik and Knuckles.

Sonic Boom: Fire & Ice (2015)
From October to November of 2015, Carl's Jr. produced a set of Sonic toys for their Cool Kids Combos, this time to promote Sonic Boom: Fire & Ice. Even though the game and didn't release until almost a year later, the promotion still happened and included four different toys.