Blood

Slade slowly gets to his feet as dozens of minions surround the Realm Travelers and Titans. TrailBlaiser just smiles. "You're bluffing." she sneers. "You really think you can take us down with these guys?" She transforms into a scarlet dragon. The rest of the Realm Travelers transform into their animals. The A-I-Ts look up at TrailBlaiser.
"You know we can't do that yet, right?" Wes whispers. TrailBlaiser lets out an exasperated sigh.
"You can use some magic, can't you?"she groans.
"Well, yeah, but-"
"'Don't question my authority!'" TrailBlaiser cuts him off.
"I wasn't. I was just asking what-"
"'I reject your reality and substitute my own!'" Terrance gives her an incredulous look.
"If you're done throwing out 'Mythbuster' quotes, can we just beat them now?" RiverFlyte asks. TrailBlaise shrugs.
"Whatever." She flies over to a group of mininons. "On your mark, get set, prepare to get your butss kicked." She gives them a hard whack with her spiked tail, sending them flying to the wall. The rest of the Realm Travelers begin fighting. After a few minutes, all the mininons are defeated and fade into the shadows. TrailBlaiser looks around. "Oh squirrel muffins." she sighs. "Where's Slade?" SwiftWind, in cat form, jumps from beam to beam across the ceiling.
"Well, he isn't up here." she meows. Rabbitleap, in wolf form, sniffs the floor.
"I've got a scent!" she exclaims. She follows the trail to a courtyard just on the other side of the wall. "Oh, um, hm. You're probably not going to like this, but there's also the scent of rocket fuel." TrailBlaiser's head droops. "But on the bright side, he was injured in the fight." TrailBaiser perks up.
"How can you tell?" she asks. Rabbitleap transforms back into a human and points at a red blotch on the ground.
"Can't you tell by the metalic, salty scent in the air? Blood." she whips a vial out of her pocket and gathers some of the still-fresh liquid. "Aslo known as DNA." TrailBlaiser lets out a triumphant roar.

Back at the T-Tower, Rabbitleap puts the blood sample into the scanner and runs it against Robin's. They all wait with bated breath for it to process. When it finally dings, Rabbitlea reads the report, finally letting out a laugh. "Yep." she sighs. "Figures." She shows TrailBlaiser the report. "No genetic relation. So, fan fictions all over the world have now been proven... false."