The Diamond Griffin is a re-skin of the regular Griffin that is recolored in blue and yellow. It has a diamond body with golden wings, golden eyebrows, and a golden beak. Sort of like the pets from the Golden Egg, the blue parts of the Diamond Griffin's body turns dark blue at night.
The Neon Diamond Griffin glows blue on its body, and golden on the same spots the Griffin would glow.
Mega Neon Appearance
Just like how the Neon Diamond Griffin would glow, the Mega Neon Diamond Griffin glows from Pink to Blue.