I was referring from the context of a martial artist such as Robin from the animated Teen Titans. Sure, she (spoilrs for the Sword and the Scoob)
spoilers:
beat up some rennaissance faire jousters posing as knights deliberately attempting to manipulate the gang into signing over the city |
end of spoilers but that doesn't prepare her for taking on a Robin
As for continuity in the DTV movies, there are distinct continuities there. The "Monsters are Real" movies are not in continuity with the others, the "What's New Scooby Doo" movies such as Scooby Doo and the Samurai Sword which were cited above as evidence of her martial arts prowess were in continuity with that show but the modern era of DTV movies is very explicitly not in continuity with those, and Samurai Sword in particular represents a problem when trying to put all of those movies together: Velma and Fred are exposed to the actually supernatural in that film whereas Curse of the 13th Ghost explicitly says she has never seen it. The current continuity does include a broad strokes version of movies such as Zombie Island but until explicitly stated there's no way to judge feats from the previous era of movies (which, again, were in continuity with the show.
But ultimately it comes down to the fact that Scooby Doo has a number of different continuities that interact in spotty ways and have one clear point of distinction. The What's New Scooby Doo era DTV movies such as Samurai Sword were established in Scooby Doo and the Goblin King as having the home town of Coolsville (The same from the WNSD TV show, as well as the live action movies and A Pup Named Scooby Doo) while the more recent movies were established in "Happy Halloween, Scooby Doo" as having the home town of Crystal Cove (The same one from Mystery Inc, the YA Daphne and Velma novels, and the lego Scooby-Doo films). Therefore current continuity Daphne is no martial artist and no threat to ATT Robin. Unless you can find some evidence in Be Cool Scooby Doo or Scooby Doo and Guess Who to disprove this