Excellent, a new thread :). Anyway, something I've been having fun with in UU:
SunnyBeamer
Arcanine @ Life Orb
Flash Fire
Modest
4 HP / 252 SpA / 252 Spe
- Sunny Day
- Fire Blast
- SolarBeam
- Morning Sun
You'd never be able to pull off a set with Fire and Grass as your only attacking types in OU, but with the lack of Heatran and Dragon-types in UU, this set doesn't actually fare too bad. Sunny Day helps Arcanine so much: it boosts Fire Blast's power by a further 1.5x, effectively giving it a second STAB boost in addition to a Flash Fire boost if you've managed to pick it up (Flash Fire Fire Blast in the Sun does 62% on average to Calm Chansey); Sunny Day removes SolarBeam's charge turn, letting you blast Slowbro, Regirock, Rhyperior, and Milotic into oblivion; it halves the damage of Water attacks against Arcanine, effectively removing your Water weakness; and in the sun, Morning Sun will heal 66% of Arcanine's health with every use, letting it make the most of its natural bulk.
Base 95 Speed is such a blessing in UU since it lets you outrun the ubiquitous +Speed base 80s that are kicking around everywhere without requiring you to run a speed boosting nature yourself. The only real problem this set faces is opposing Fire-types, in particular Flash Fire users. I've been pairing it up with a slightly bulky Dugtrio designed to survive ExtremeSpeeds from opposing Arcanine, and it is great for removing other Fire-types like Houndoom as well. If you're gutsy enough, run this with another Fire-type such as Moltres. Arcanine will remove any bulky Water or Rock counters for Moltres, letting it sweep unhindered, and it might even be able to use the sun to its advantage for a while as well. Alternatively, use Arcanine alongside Gallade, a great partner. Arcanine is more than willing to come in on any attack Spiritomb will be throwing Gallade's way (WoW me pls!), and in return, can lure in and remove Slowbro for it as well.