Great Great Great! Note that you could always use Baton Pass over Toxic if you want to pass it on, but overall great.
If this is in standard battling, He's fine, but if this is in PO he needs HP Fighting Over focus Blast due to Focus Blasts's Unreliability.
Okay, I personally Would prefer a Jolly Nature on him, but if you really wanna keep adamant, then give him Brick Break for more reliable Coverage.
Is looking Great! Although I prefer a Scarf on mine to make sure he actually outspeeds opponents, because with only 80 base speed even with timid that only moves him up to 88, Versus the average sweeper Ev trained in speed he's done for
Dude, He has 125 base speed, he can afford to have an Adamant nature, and I also would like to point out that your team has no priority anywhere in it, making Pokemon with Priority a bit of a Threat at points, so you might want to Consider using Ice Shard over Ice Punch, just so you have it on your team.
He's looking great, but I personally prefer HP Bug on him, over Aqua Ring for that Extra Coverage, Also so he doesn't get completely destroyed by Dragon Dance Feraligatr