I am so glad that you can now have 12 letters for a nickname. I can name a female Luvdisc “HarunaKojima” after Miss Haruna Kojima. Kojima-san is a Japanese actress, underwear model and beloved member of AKB48. No, I am not going to show a slide show of Haruna Kojima wearing pink underwear just because pink is Luvdisc related. Well, maybe just one photo.
The name “KojiHaru” might also be used if you are a fan, as that is her real nickname.
Another possible nickname might be “Valentine” or for a male “Valentino” after Rudolf Valentino, a famous actor and HEARTHROB in the silent movie era. In the 1920s, women would swoon and pass out when they saw him on screen. When I make the nickname Valentino, I always make the “o” the “male symbol for extra potency.
In general, I only like female Luvdiscs. If I catch a male, I just take the Heart Scale from it (if it holds one) then release it or put it on the Wondertrade.
I sometimes name Luvdisc after old girlfriends.
If you can suggest a good nickname, please comment!