One opinion is Night Slash and the Shadow Claw aren't better than 1 or the other because they are variations of the same move but they are of different typings. Another opinion is Night Slash is always better than Shadow Claw because it's Dark vs Ghost. Only difference is Shadow claw can't hit Normal-type Pokémon. Another opinion is provided Ursaring could learn Shadow Claw which it can't, Night Slash would be the better option since it'd be capable of hitting any and all Pokémon types whereas Shadow Claw, being a Ghost-type, it wouldn't be able to hit a Normal-type.
foul play
I think night slash because more Pokemon can learn slash but few can learn night slash if it weren't a TM
there is no night slash in diamond
Sceptile, to my knowledge, is incapable of learning Night Slash.
Breeding Gen 5 Sandshrew Sandslash Farfetch'd Teddiursa Ursaring Torchic Combusken Blaziken Slakoth Vigoroth Slaking Zangoose Seviper Shinx Luxio Luxray Oshawott Dewott Samurott Cubchoo Beartic Heatmor Get a Female Oshawott Dewott or Samurott. You can get on by mating Oshawott Dewott or Samurott with a Ditto and keep hatching eggs until you get a female one. (but you only have 12.5% chance of getting it.) Then breed it with any of the above Male Pokemon. It has to know Night Slash. Then hatch an Egg for the results. The Oshawott should know Night Slash
Shadow Ball
Paul's Ursaring knows the moves Slash, Bulk Up, Focus Blast, and Hammer Arm. Ability: Guts.
foul play
Sources say... Night Slash...
I think night slash because more Pokemon can learn slash but few can learn night slash if it weren't a TM
there is no night slash in diamond
Sceptile, to my knowledge, is incapable of learning Night Slash.
Dave Murray is much better than slash. slash is just overrated
It depends on what your team is. You just have to simply train it until it learns good moves. Try teaching it some TMs or HMs. It may take a while but it will eventually get better. Assist can be very helpful if your pokemon know some very powerful moves as well as Shadow Claw Night Slash and Slash. Good luck.
Breeding Gen 5 Sandshrew Sandslash Farfetch'd Teddiursa Ursaring Torchic Combusken Blaziken Slakoth Vigoroth Slaking Zangoose Seviper Shinx Luxio Luxray Oshawott Dewott Samurott Cubchoo Beartic Heatmor Get a Female Oshawott Dewott or Samurott. You can get on by mating Oshawott Dewott or Samurott with a Ditto and keep hatching eggs until you get a female one. (but you only have 12.5% chance of getting it.) Then breed it with any of the above Male Pokemon. It has to know Night Slash. Then hatch an Egg for the results. The Oshawott should know Night Slash
Absol learns the move Night Slash at level 41. Absol also learns the Psychic type version of Night Slash called Psycho Cut at level 47.
Crunch-80 chance at lowering defense Night Slash-70 high critical hit chance