This matches Donnie well, as he is more along the lines of defense and strategies more than offense. There's a running gag where his bo-staff is easily destroyed by an enemy.
The Pulverizer (Timothy) once used the Bo-Staff to practice ninja moves, which he stunk at, until Donnie showed him some basics (he nearly killed himself when he triggered the blade)
Mikey used the Bo-Staff when he was forced to poke Master Splinter with it while he was resting in "I, Monster" ,and managed to push the hidden button, sending the blade within inches of Splinters face.
In the episode "Pulverizer Returns" Leonardo was forced to used the Bo-staff by Splinter to teach the turtles how to fight outside their elements. Leo would often trip over it though (he tried to use it in the style of him weilding his katana).
In the TMNT Adventure comic, Raphael used the Bo-Staff so he could learn how to fight outside his element.
Donnie's tricked-out bo staff smacks, spears and jabs like no other.