That's sort of different, since she's a regular Knight available to everyone with the code. Code Girls are only available to the one person with the product.
I think the current Violetta Tulip one is an old one, so if you claimed it before you cannot right now. If you haven't before, here's the codes for her (I believe it's first one listed in her section):
https://harem-battle.club/wiki/Flowe...Violetta-Tulip
I never did it, tried it and it still works. Good for 2K gold and 200 BC
my first code gurl in Nutaku was Chocolate Cosmos coz they had some Anime Convention
Nutaku: July 2016 | Flower Knight Girl: 835228859 | DMM: 646263953 飢えたハンター
Plays Flower Knight Girl, Aigis, Kamihime
Dropped Harem Heroes. Staff deleted my nice reason for not spending $.
Signature made by Myrdin
Another Weekly Gacha for new Code Girl: Lindernia [December 06 - December 13]
Steps:
Details:
Weekend Gacha: Dragon Gacha [December 08 - December 09]
Details: