Okay. Editing my answer.
Fully reviewing Spinda and Smeargle and creating a spreadsheet, I have come up with the following.
Your last move slot should be Drain Punch.
Drop Protect for Sucker Punch.
A low investment in HP is great. Drain Punch will be healing Spinda every turn after a successful set up.
The weakness I see comes on turns one and two. You might actually suffer a bit if your opponent uses Super Speedy Pokemon/Scarf users that can ram through your readable tactic.
You can secure a sweep by Turn 3 at best.
Not knowing what your team mates are, I can't see much else to do here. Beware of double Kick Blazikens that people seem to like to counter Sturdy Stealth Rockers with these last 5 weeks. That will take you out in one turn.
What is Smeargle's item?
Oh! What about using this set in Doubles with Mat Block Choice Scarf Greninja? That will allow a free Set up turn.