Echoed voice Pyroar:
Pyroar @ Metronome
EVs: 252 Sp.Atk, 252 HP, 4 Speed
Basically, you spam Echoed Voice to get it's boosts, also boosted by STAB and metronome. If you are worried you don't have the bulk to boost echoed voice, or get a OHKO with it on your first turn, use Flamethrower, also STAB boosted. Hyper Voice is for fire resistant Pokemon that you don't have the bulk to Echoed Voice to death. It's rare you'll need to use Hyper Voice, as Echoed Voice and Flamethrower are good enough for most things. Noble Roar lowers the attack and sp.atk of your opponents, so you aren't KOed as easy, so you are asfer when Echoed Voicing. This is especially good against stat boosters, as you don't risk being KOed while you echoed voice, and it's boost helps overpower your opponents if it's Sp.Def. It's unfortunate he doesn't have much bulk, as this set would be even better if he did.