Zords (Power Rangers franchise and two Super Sentai series)
Various named Sentai mecha (Super Sentai franchise)
The Ecto-Skeleton (Danny Phantom) was capable of amplifying Danny's ghost powers 100 fold, but at the cost of drastically exhausting his body.
Lena Luthor (DC Super Hero Girls/DC Comics)
When Dib's (Invader Zim) skeleton was crushed by a paramedic in a freak piggy accident in an alternate timeline, his father Professor Membrane created for him the MegaBoy 3000, a fusion-powered titanium exoskeleton that "gave him the strength of ten thousand little boys!"
Despite being a small, petite girl, Heloise (Jimmy Two-Shoes) is very intelligent and sadistic as she makes inventions for Misery Inc. that would spread misery to her town and also likes to destroy things for fun.
Sonic's Mech Suit (Sonic Boom)
Basque, Frida, Jackson and Grimm (Teenage Mecha Ninja Turtles)
Phineas and his stepbrother Ferb (Phineas and Ferb) can pilot any giant mech like The Murphy Law Suit
The Power Rangers (Power Rangers) are well known for their various Megazords such as the Dinozord. Additionally the Super Sentai franchise that Power Rangers was based off of have a long standing tradition of using various mecha as part of each of their series.