Rob Paulsen, who provides the voice for Donatello, also provided the voice of Raphael in the 1987 TV series until it's ninth season.

He's named after the Renaissance Sculptor Donatello.

His bandana color, purple, represents his personality - Wisdom and Intelligence.

Unlike his other incarnations, this version of Donnie has a crush on April O'Neil.

He could have a friendly rivalry with Casey over April's affections, but would probably not to the point where he made the mistake his father and Shredder made years ago.

This Version of Donnie has a gap in between his teeth.

In this version, while Donatello still fights with his weapons of choice, a Rokushakubo, (a Bō staff), in this incarnation his staff can be converted into Naginata, (a "pole-blade"), via a retractable blade inside one end of the staff. It has been seen as early as the events of "I Think His Name is Baxter Stockman".

In the episode "Metalhead", Donnie gets permission from Splinter to upgrade his weapon, but after the events of the episode, it would seem that he decided against it, but the retractable blade feature makes more appearances afterwards.

Donatello is the tallest of his brothers.

There's a running gag in the series where he gets grabbed by the face by Leatherhead when he gets out of control.

His main season is springtime.

His main elements are forest and metal.

Donnie is the genius of the team.

He's so far the only one to have or attempt, to train someone.

There's a running gag where his Bo' Staff will break in a fight.

He has mastered Bōjutsu, Sōjutsu, Naginatajutsu, 'Bōryaku, 'Intonjutsu, 'Tenmon, 'Chi-mon, Shinobi-iri, Shurikenjutsu, Archery, computer hacking, building machines, and Bōryaku.'

His name in Italian means Gift.

His kanji name is ドナテッロ (Donaterro)

He knows medical treatment.

He can hold his breathe for 15 minutes.

It's possible he could start a rivalry with Casey over who wins April's heart.

Donnie's eye color goes from brown to red.

Due to his behavior in "I Think His Name Is Baxter Stockman" (and various other episodes), he is the second to Raphael in temper and anger.

When Donnie's T-Phone rings, it has the tune of the intro of the 1987 series.

In Karai's Vendetta, his caller ID for April's phone is "Donny Boy" and she has a picture of him with flowers and stars, a dark red butterfly or bow on his mask and a silhouette of a cat.

It is revealed at the New York 2012 Comic Con that Donatello has a pet cockroach who will undergo two mutations and become a villain .

According to J.R. Ventimilia (executive producer) Donatello is "(...)a little obsessive compulsive, a little high-strung.

He's the third oldest/second youngest of his brothers; Leonardo, Raphael & Michelangelo

Donatello is an expert in fields of metallurgy.

Despite being opposites, Donnie has been shown being really close to Mikey.

He has a picture of April eating pizza as a screen saver for his computer

For some reason, Donnie, along with Raph, wanted Mikey to still believe in Leprechauns and were urgently trying to tell Leo not to say they weren't in "Enemy of My Enemy"

His main pillars are wisdom and weapons.

He's so far the only turtle whose named has been said by the Kraang.

He has an IQ of 637.

His quote "My sweet princess is alive" could be a reference to the game, Donnie Saves a Princess.

Out of all the Turtles, Donnie seems to tolerate the Pulverizer/ Timothy more.

He has a minor case of OCD (Obsessive Compulsive Disorder) which explains his occasional anger outbursts.

The first two humans who have entered the lair (April and Pulverizer) have been closer to Donnie out of the four turtles.

He is the first turtle to be seen without his mask on.

He is the second turtle said "Booyakasha!"

He is the first turtle who was kissed (thrice on his right cheek, first time was Mikey, second time was April and the third time was Bigfoot).

He has a fear of rejection in relationship with April.

He played The Wizard in Mazes & Mutants like his 2003 incarnation in BTTS episode, "SuperQuest".

He is the third Turtle to hide completely in his shell, as seen in "The Lonely Mutation of Baxter Stockman".

He is the first Turtle to have his name mentioned by the Kraang.

He is the first Turtle to stop breathing due to nearly dying in his dream in "In Dreams".