Pyroar @ Choice Specs
Ability: Scrappy
EVs: 252 SpA / 208 Spe / 48 Def
Timid Nature
-Boomburst
-Heat Wave
-Hidden Power Fighting
-U-Turn
Inherits from Swellow. Two low-tier mons working together to form a formidable offensive powerhouse. Max Speed is recommended for Modest - the investment above is enough to outspeed base 100s. 252 SpA / 224 Spe / 32 Def with a Timid nature outspeeds Garchomp as well.
You'd be better off using either Flygon or Exploud as donors for that set, as Flygon gives you Earth Power and Fire Blast as well as negating your Ground weakness, while Exploud gives you a better movepool in general (although you do have to sacrifice U-turn).
Raikou @ Life Orb / Lum Berry
Ability: Levitate
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
Nasty Plot
Thunderbolt
Ice Beam / Energy Ball / Psychic
Fire Blast / Taunt
Inherits from Azelf. Levitate removes Raikou's only weakness. Thunderbolt gets STAB, and wrecks anything not resisting it at +2. After Nasty Plot and Thunderbolt just pick whatever moves you wan depeedning on what you want to hit. EVs maximise Speed and power