Hi i'm new on the forums but I think I can give you a hint on how I did it.
What you can try is bulking blaziken 2-3 times and sweep with blaze kicks (field effect 1.5x). It would be nice to set-up instantly on wigglytuff by first killing its power with feather dance. (Optional: for extra oemph against pure normals / in general it might be good to teach it brick break instead of double kick if you can)
Basically:
- Start with pidgeot and spam feather dance on wigglytuff (if it outspeeds you there, it can be an issue)
- On pidgeot KO (OR 3 feather dances) → switch to blaziken.
- bulk 2-3 times and start kickin'. By now it should outspeed everything not-priority(speed boost <3) and be able to OHKO about everything.
Best of luck