Lol, reminds me of trying to buy alcohol the night I turned 21. Not easy when they're not allowed to sell it after 12.
I've used Mantine on just about every one of my competitive teams with a decent amount of success. He pairs well with my Sandslash due to being able to spin away SR and use EQ without damaging his partner.
Ah, yes. Good ol' Stealth Rock. People complain about how much of a mess G1 is, but they never bring up how broken of a move exists in the current metagame. It's so annoying having to waste move slots on otherwise-worthless attacks just to get rid of it. It might not seem as "broken" to everyone else, but when the entire metagame revolves around a single move, it's no wonder...