You're missing 4 EVs in Speed
Lemonade. xD Anyway, since the most obvious pick in AV was taken already, I'll go for something completely different:
Dragalge @ Black Sludge
Ability: Adaptability
EVs: 248 HP / 252 Def / 8 SpA
Bold Nature
- Toxic Spikes
- Sludge Bomb
- Dragon Pulse / Scald
- Scald / Dragon Tail / Protect
Defensive Dragalge might have some opportunity cost, but having a fat TSpikes user that can inflict both poison and burn is pretty sweet, all while hitting pretty hard for a defensive mon. This focuses on Dragalge's cool defensive typing and ability to take a pretty good beating, though you would do well to pair this with a Wish user. Toxic Spikes is the focal point of the set and serves to wear down any Pokemon affected by them. Sludge Bomb hits what it needs to and Adaptability gives it some bite. That 30% poison chance is also really cool for hitting Levitate Pokemon and Flying-types. Dragon Pulse is the primary option in the next slot for a secondary STAB and a way to pressure opposing Poison-types that may be willing to absorb your Toxic Spikes. Scald is an alternative that has a pretty sweet 30% burn rate, but should really only be used if you want the utility out of one of the alternate moves in the last slot. If Scald isn't chosen as the 3rd move, it's the go-to option for the last slot. Dragon Tail and Protect are other options to plug in should you opt for Scald over Dragon Pulse. Dragon Tail can work beautifully in conjunction with Spikes support and can make it quite difficult for Defog and Rapid Spin users to get in safely. Protect is useful to scout for potentially dangerous moves and to gain Black Sludge recovery, as Dragalge lacks reliable recovery of its own. The EVs maximize physical bulk since Dragalge can handle most special attackers it wants to switch into without the need for Special Defense investment. However, if you need Dragalge to be a sturdier answer to the likes of Moltres, Mega Pidgeot, and HP Ice Jolteon, you can use a Calm nature and shift Defense EVs to Special Defense. Just know that you won't be able to make much use of that Fighting resistance without Defense investment.
