Actually, if I remember the manual correctly. Some of the offical art has it as hair too. Mainly Ruby/Sapphire.
Yuuki and Haruka (R/S) Brendan and May (R/S)Hibiki and Kotone (HG/SS) Ethan and Lyra (HG/SS)Leaf and Red (FR/LG)Kris and Gold (Crystal)Kouki and Hikari (D/P) Lucas and Dawn (D/P)Haruka and Yuuki (Emerald) May and Brendan (Emerald)Touya and Touko (B/W)Kouki and Hikari (Platinum) Lucas and Dawn (Platinum)Tell me your name!