>>34537841Mega Houndoom is fine without sun, it has the power and speed to make things work because it has Nasty Plot, you just need a good way to switch it in against something it checks so you have a turn to use NP. Slow U-Turn and Volt Switch guys help with it. Good partners for this are Scizor, most Rotom forms, Magearna, and Magnezone/Magneton. you can laso take advantage of base form Houndoom's Flash Fire ability and try to bait opponents into using a Fire Move it can switch in on by luring them out with a Grass or Steel type.
It outspeeds a lot of stuff and hits harder than most people think. It's perfectly fine without the sun. Solar Power is kind of a bad ability anyway.