Zekira you can choose any mode in order to achieve one of the 2-costume songs's variant. Just remember that one is unlocked by clearing a song with FC, and the other one by clearing the song with at least a miss for the Silver Crown (even if you got the gold one before!)
Below there are said songs, listing the 'Silver unlock' first and then the 'Gold Unlock':
Momoiro Taiko Paradise - Silver Drum / Golden Drum
Hikari no Kanata e (regular) - Silver Wings / Golden Wings
Joubutsu 2000 - Green Tank / Desert Tank
Shimedore 2000 - Silver Shisa / Golden Shisa
Anyhoo, more Katsu-Don Soroban messages!
Futsuu
前作から加わった新システム称号についてちょっとした話をお送りしたいと思います なんとなんと今回の称号では
Muzukashii
前作には無かったような条件の称号が今後増えるらしいです なんだってー 今後追加されるらしい新しい条件とは
(also aqua remember to translate the Taiko 12-12.5 morse code, it's still untranslated in the site!)