I have used Cacturne in every one of my R/S teams. But the question is... is it any good at all? I'm still using it if it's not, but I need an opinion or two.
he's unusual in that he's the only non rock/ground/steel type who's immune to sandstorm, and he learns the nifty attack Needle Arm... however, he's kinda underused given his type combo, stat placement and moveset...
Cacturne has an awesome defensive moveset which it can't use at all. It doesn't get the best Special Attacks (or Attacks for that matter, why it can't Brick Break I have no clue). But I like it (also, it has the highest Special Attack for any Dark type), so I gave it a Good rating.
Good... there are better but you could do worse. If only he had some speed to make use of Needle Arm and it's flinch ability. 229 MAX speed ain't that great. 60base power ain't bad for a grass move though.
It's alright; its defenses suck but its special attack and attack are good. It makes a pretty decent special sweeper with:
Growth
Needle Arm
Faint Attack
Filler? :-/