LBT and Yu-Gi-Oh: The Abridged Series.
OMG!! LOL! BEST CROSSOVER EVAH!!!1!!4 XD If only Keni could see this. I am actually doing a Yu-Gi-Oh/LBT story. (Keni once told me there was a crossover done before at ff.net, but for reasons unknown it was taken off) But the dinosaurs interacting with the Abridged counterparts? I can see it now.
Littlefoot: "Hey, that's against the rules!"
Cera: "Screw the rules I have treestars!"
Kabia: "Hey, that's my line!"
"Attention, duelists! My hair is being trampled by a sharptooth!" XD
Wow, I am in a wacky mood today. X_X Beats being depressed though.
Back on topic:
Courage the Cowardly Dog and the Land Before Time
A portal warps Courage, Eustace, and Muriel back to the time of the dinos, and now they must get back to their own time with the help of the Gang of Five. I could just picture Eustace scaring a sharptooth with his mask. XD