Ookay, let's tackle this a bit:
+ Okaaay, I know you told us to ignore technical stuff for now, but giving everything an ability name both hogs precious card space and adds nothing to the card's functionality. Maaybe you should only give names to abilities that you reuse repeatedly, like how Wizard treats keyword abilities? Note that cards that refer to other card groups usually refer to them by type, not by name, otherwise you'd have to specifically state "a creature which has 'Naruto' in its name" or something like that.
+ MTG creatures should not be so heavy on activated abilities. That both either makes your creatures overpowered or forces you to make them very expensive to balance it out, and makes any deck constructed out of your cards veeery dependent on the creatures. You should move the majority of the abilities into other card types like sorceries, instants and enchantments, and tone down a good portion of the cards so that the player will have cheap cards to play early game.
+ Naruto Uzumaki: Both quite slow and quite overpowered. You might want to tone down Shadow Clones so it's cheaper but produces fewer tokens, and also revamp Rasengan heavily because the ability to pretty much shut down all creatures for 3 mana after 3 turns of set-up is very overpowered, especially late game if both you and the opponent run decks that can build huge armies while waiting for a chance to crush the other.
+ Kiba and Akamaru: This...doesn't quite work with MTG mechanics. Either sacrifice them both and replace them with a 7/5 trample creature token, or make one equip to the other as an Aura or something like that and give appropriate bonuses.
+ Shikamaru: Needs to be reworded. Right now he doesn't tap when he uses the ability, and "stays tapped" is a very vague phrase that doesn't really clarify what loopholes, if any, by which a player can untap him AND keep the taken creature. Releasing the creature shouldn't give you mana. Also, Shikamaru has no mana cost or P/T :S
+ Kisame: Overpowered. I'd lower his P/T a bit, maybe to like 3/4 or 2/5, since Surge can give him a lot of power. As for the second ability, although it costs more than most destruction abilities, it can give you a lot of mana, and colored mana no less, so I'd say you toss that out completely. Also, Kisame is horribly un-blue.
+ Neji: Don't put unblockable and scry 3 on combat on the same creature. Or at least make it really expensive/weak.
+ Rock Lee: 4/4 vigilance on a 4-cost is a bit much. Vigilance also doesn't fit on those colors at all.
+ Deidara: Uh, no. As soon as you have something that lets you kill of the tokens at will he becomes a very resilient death machine. Complete rework please.
+ Hidan: I assume you mean +1/+0 counters. Indestructible, deathtouch and counters per combat on the same creature is a very powerful combination to be on the same card. Needs big nerf.
+ Kotoamatsukami: The life switch is strong, the 5 damage follow-up is brutal. Making it not counter-able is even worse. However, you also kind of forced players to either make a deck around this card, or not use it at all, due to the somewhat niche effect and a whooping 6 colored cost between 2 colors.
+ Absorb: Haha, no. If it's only either counter OR prevent damage, AND only do that for one spell/one source of damage/one combat unless kicked, then it's okay, otherwise don't.
+ Kakashi: Read: I play this Into The Maws of Hell, and my opponent explodes! Should 1) read "target ELIGIBLE creature or player" so you can't redirect certain creature-exploding things on players, and 2) not have double strike. Double strike is usually reserved for low-power creatures who most likely can't really do anything else.
+ You have too many expensive cards and abilities. Tone some of them down. The P/T of your creatures is generally also quite high already for even ability-less creatures, to say nothing of creatures with powerful abilities.
+ Any spammable ability that gives +1/+whatever is quite strong, and VERY strong if it only costs 1 mana. You should only give out these abilities very sparingly to mostly weak creatures, and you shouldn't let players put those on anything they want to without a reasonably high cost. Also, blue and black are unlikely to be able to make good use of it.