Techniloom is very dangerous. STAB Technitian Mach Punch hurts a lot like Technitian Scizor's Bullet Punch, but unlike Bullet Punch, Mach Punch hits more types for Super effective damage. There's also Technitian boosted STAB Low Sweep for CB Breloom that can outspeed and KO certain threats if they sustained enough damage. (Latios/Tornadus-T/Garchomp/etc.)
Bullet seed. A joke that it was before it got stronger in BW and then eventually very powerful with the release of Technitian move. With Technitian alone, it has a potential base power of 187.5. Now imagine it with STAB and either a Choice Band or a boost from Swords Dance. That there is too much power.
Here's a set for Techniloom that is very good.
Breloom@Life Orb/Choice Band
EVs: 252 Atk/252 Speed/4 HP
-Swords Dance/Low Sweep/Stone Edge