This interview was published as an advertisement for Sonic the Hedgehog 2. The exact date of the interview is unknown but it seems to be earlier than its publication date as 20 levels are mentioned to be in the game. It could be possible that they included special levels or 2-player levels in the total. It's also not known who exactly who is being interviewed as more than one person helped create Sonic 2. The Magazine scan where this interview is contained can be found here.
Interviewer: How will Sonic 2 be different from the original?
Sonic 2 Creators: Sonic 2 will be much faster and have many more new moves. Like "Spin Dash", which will propel him forward really fast. You can play alone or two people can play with or against each other. And Sonic has a new friend called Tails, a four-year-old fox that has two tails and is almost as fast as Sonic. Tails can also use his tail as a helicopter propeller to fly.
Interviewer: Will there be more levels?
Sonic 2 Creators: Yes. Over twenty different stages now. There are a lot of new challenges, like corkscrews and a chemical factory. Also, Dr. Robotnik is back and he comes with 25 different enemies. My favorite is the coconut throwing monkey.
Interviewer: How do you get your ideas?
Sonic 2 Creators: All kinds of ways. For example, when Dr. Robotnik captures animals, he puts them in a metal shell. We got the idea for that from a movie we saw as kids, in which a giant gorilla is encased in armor. Ideas can come from anywhere.
Interviewer: How do you go about creating a game?
Sonic 2 Creators: We start with a storyline, and then create the action and graphics. But we change the storyline a lot as we go, so we have a writer who works with us. For example we added the Mechanical Zone (probably means Scrap Brain Zone) after we decided to put the animals in metal shells.
Interviewer: Is there anything you'd like to say to Sonic 2 players?
Sonic 2 Creators: Take care of Tails. Look for many rooms. And have fun. Having fun is the most important thing.