Shyvana's ultimate, Dragon's Descent, is the only non-toggle champion ability in the game that is not cooldown based.
Shyvana's dance is from the music video RIVER by the Japanese idol group AKB48. A side-by-side comparison of the dance can be seen here.
Shyvana's lore was changed after release, removing references to being attacked by a mob and instead having Jarvan IV save her from the wrath of the dragons. This change was done because it was felt that the original lore did not make it sensible for her to join Demacia.
Her lore was changed once more to have Shyvana simply team up with Jarvan IV on the similar goal of slaying the dragon that killed Shyvana's father.
Shyvana was the first champion since Kog'Maw to not receive a League Judgement. With the exception of Varus, no other champion since then has received a Judgement either.
Shyvana's rage system was mislabeled as "Dragon's Blood" on her mechanics preview.
Shyvana is the third champion to feature a physical transformation ability, the others being Nidalee and Swain released before her, and Zyra and Elise released after her.
Shyvana's quote, "The quiet before battle.", is similar to the popular idiom "The calm before the storm."
Shyvana's quote, "On wings of fury.", is similar to Vayne's quote, "On wings of night."
Ironscale Shyvana is a reference to the scale armour worn by warriors of different cultures.
Scale armor is often associated with dragons in various fantasy genres. This is most likely due to how the individual metal scales are overlapped with each other, resembling the fictional scales of a dragon.
The dragon form of the Ice Drake Shyvana skin bears a resemblance to Kyurem from the Pokémon franchise.
Ice Drake Shyvana is a community requested skin, fan named Whiteout Shyvana, the original Whiteout Shyvana however, was more focused on the white colors than on the actual cold theme that Ice Drake Shyvana has. The original thread can be found here.
Moved by Shyvana's plight, Jarvan IV assisted her in slaying the mighty dragon that killed her father. After the battle, Jarvan IV offered Shyvana a place as a noble warrior in the ranks of the Demacian Elite Guard. Out of gratitude and necessity, Shyvana accepted.
Garen views Shyvana with disapproval due to her lack of self-control. Among Demacians, Shyvana gets along with Xin Zhao best, after Jarvan.
Shyvana is curious and envious of Nidalee's freedom and her balance between her human and animal forms, and doesn't understand Ahri's desire to become fully human. Shyvana hates being turned into a squirrel by Lulu. Shyvana sees Twitch and Zyra as no more than a snack and something to burn, respectively.
Galio is a friend of Shyvana's and his wisdom has a calming effect on her rage.