this chat happens after the events of the second movie. Sonic, Tails, Knuckles, Tom, Maddie, and Ozzie (their dog) are one big happy family!

Knuckles: I hope they have grape flavored ice cream! him and his “brothers (Tails and Sonic)” hopped into the back of Toms truck and Maddie followed close behind as Tom laughed

Sonic: ooh! runs to the cooler and grabs the master emerald can’t forget this! runs back to Toms truck