Fun Facts -- Golden Sun and Pikmin:
Golden Sun release date: NA November 11th, 2001
Pikmin release date: NA December 2nd, 2001
Both games also came out in 2001 in Japan and 2002 in Europe.
Sales:
Golden Sun: 1.65 million WW
Pikmin: 1.60 million WW
Golden Sun the Lost Age: 1.12 million WW
Pikmin 2: 1.12 million WW
Both Golden Sun Dark Dawn and Pikmin 3 failed to cross the million mark with their third entry.
Source:
https://www.neogaf.com/threads/nint...dware-sales-data-from-1983-to-present.963700/
Pikmin 1 and 2 also got re-released on Wii under the "New Play Control!" series. Golden Sun 1 and 2 also eventually got re-released on the Wii U virtual console.
I bring this up because, success wise, Golden Sun is basically on par with the Pikmin series. Pikmin also had a recent spin-off on 3DS that bombed hard. Pikmin also has a playable character/s with Olimar and Alph in Smash, several music remixes, and a stage. Golden Sun has none save a single remix, despite the parallels of Isaac and Mathew being similar, and the sales success being the same.
Nintendo also placed a strong bet on Pikmin 3 to get Wii U's momentum up and running in 2013. That didn't happen. Golden Sun Dark Dawn was released on a waning DS with the barren 3DS launch on the horizon. If it were delayed and retooled for 3DS, the sales tale may have been different, despite the game's design problems, as it would've been an early brand new RPG release on the new 3DS platform, heading off the release of Fire Emblem Awakening (a game that revived that series) and Bravely Default (also a successful game).