An interview between Shigeru Miyamoto and Yuji Naka for Famitsu has been recently translated. The interview took place in December 2001, around the release of Sonic Advance for the GBA. In the interview, Naka explains that after SEGA stopped making hardware, he was eager to try Nintendo’s. When speaking of the GameCube and GBA connectivity feature Naka said “I immediately thought, “I want to make something for this!”, and rushed to get it added to Sonic Advance.” It seems that this also really helped in the development with the new feature as Miyamoto said “Naka was very proactive with testing the connectivity feature, and it really spurred us on.”
Here’s what Naka had to say about the connectivity feature:
“When Nintendo first announced it, I immediately thought, “I want to make something for this!”, and rushed to get it added to Sonic Advance. In fact, it turned out to be much more difficult than I expected… I’ve always loved hardware, as you know. All the moreso now that Sega has stopped doing hardware. I saw the GBA link and was like, “let me use that!” (laughs)” — Yuji Naka
You can read
the full interview here.