Hi, I heard you were looking for a female Mawile with Intimidate, and I happen to have one if you want it. I could also try breeding you one with Ice Punch if you want that instead. As for Horsea, I could try breeding my Kingdra and getting you one.
If you're gonna use it as a mixed attacker, I seriously suggest that you use 2 physical and 1 special attack. If you're not gonna use its 130 base attack at all, well, go for it but I seriously hope you know what you are doing. Its base special attack is a mere 80, in case you were wondering.
Just one point? If it's in speed, it can. If it's in HP, it can depending on whether or not it's a sub user. If it's in anything else, not really. You DO mean it's missing one point, not one IV, right? Because missing the IV can hurt.