Define "common". <_< Nothing is really stolen from more than 2-3 enemies in FFX, so nothing ranks as especially common to me! (Petrify Grenades are stolen from an enemy on the Djose Highroad, an enemy in the Calm Lands, and an enemy in the City of Dying Dreams, none of them super-common but none truly rare, either.) But if you mean "if you know the enemy to steal from it is common to get" then sure.
Yeaah, not much respect for DL items Rikku hype. It really should be obvious by now!
Godlike:
Cecilia (WA) vs. Rikku (FFX): Woo.
Gadgeteer (WAXF) vs. Ranger (FFTA2): Gadgeteer is -also- annoying in the DL (yay spending ridiculous amounts of money AND relying on a mastery skill!). Much better claim to the legality of its annoying tricks, though.
Heavy:
Lilika (WA2) vs. Nikki (MK:AoAR): Deathy death death. No, Lilka can not buff evade fast enough to deal with blitzes.
Middle:
Meru (LoD) vs. Yuffie (FF7): Unsure if Meru has a 2HKO here with items. If she does, she wins (isn't being OHKOed), if not, she loses. I'm assuming "common items" means storebought and not crazy stuff like Psyche Bomb X which one-shots average and means Meru is misranked.
Jude (WA4) vs. Chemist (FF5): Not sure where FF5 chemist hype in the DL is coming from, honestly? His only really good tricks are confuse and berserk (latter only against people with terrible physicals). Jude blocks confuse and Chemist has nothing else, that's assuming you even allow the cat 2 stuff, and anyone allowing Dark Matter mixes needs a boot to the head.
Wait, looking at it more closely, category 2 allows a Protect/Shell/Regen buff. That may well be enough to beat Jude. Do I allow it? Mmm... doubt it. But at least the result is believable now. EDIT: Oh, and Drink, which is definitely legal and I just forgot about it.
Light:
Edward (FF4) vs. Chemist (FFT): lulz Edward. Also, he got put in a division with three Middles, apparently (okay, Virginia is a pretty bad Middle, but still).
Virginia (WA3) vs. Jessica (MK:AoAR): Silence that isn't physically evadable. Yeah.