These are parts of a Geek Melee interview with the voice actors of Fox (Mike West) and Falco (Bill Johns)...
Mike West on his voice in Smash Wii U/3DS
''In my opinion you have 20/20 hearing. I don't know why they decided to change up Fox for this one. When you get hired for a voice job, you are alone in a booth. On the other side of the glass sits the engineer who makes sure the recording is proper. Then you have producers and directors who tell you what they want. Your job is to follow their direction.
I try not to read social media crap but I saw some pretty harsh comments about my performance as well as a couple of other voice actors.''
On recording lines for Star Fox Zero
''This go around with Fox, we all made damn sure that the voice matched the original, as much as it could after all these years. I was 34 years old when we recorded the first game, so if you do the math, Fox has an AARP card now!''
Bill Johns on the original recording session
''I came to the recording session a little early and sat in with the sound engineer and the Bad Animals producer. I was the only cast member there—we each recorded our work separately. The Nintendo team was running a little late, so they asked if I wanted to lay down some practice tracks. I went into the booth, put on the headset and started doing triplets of the first line. The idea of triplets is to do the line three times without cutting, each with as much variation as possible so editors have lots of choices. I did the first set and the Bad Animals producer seemed to like it and we moved on to the second line. In just a few minutes we had worked halfway through the script and the Japanese team came in. They were young, well dressed and unbelievably apologetic. I'm not sure how much English anyone in the group spoke, but the Bad Animals producer told them we had done some practice tracks and wondered if they wanted to hear them. They did, and as I watched through the booth window, they listened in a very stony silence. They were all still standing and they put their heads together and conferred. After a few seconds, one of the Nintendo team looked at the Bad Animals producer and said in very halting English, 'uh… more excited.' The producer turned to me in the booth and said we were going to start over and to bring a little more to the next set of triplets. I had never seen or heard the Japanese version of the game, there was no monitor to give me any cues of what I was voicing. It just had to be 'more excited.' I did another set, bumping it up another notch. It was clear these lines were in the midst of some kind of combat. Even though Falco was cool and confident and had clearly seen it all, these lines were being delivered in the midst of a very bad day. After my next recording, they conferred again, and again the same team member looked at the Bad Animals producer and said, 'uh… MORE excited.' At some point I found myself almost wondering why we were doing triplets. Each time I did the line it seemed like I was 'at eleven.' We moved on to the second line and it became clear to me that if that script was any longer than the page and a half it was, I would have been hoarse for a week.''