Alrighty, it looks like someone wants to see one of my sets. Here's my favorite thing I've created (and also a big reason why I love Obstagoon so much now):

Obstagoon @ Starf Berry
Ability: Harvest
Nature: Jolly
EVs: 244 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe (oh yeah, you can max out all your EVs in Balanced Hackmons if you want to.)
- Substitute
- Protect
- Shift Gear
- Power Trip

Not to pat myself on the back or anything, but I think this is the best thing I've ever come up with. It's absolutely genius. Because Obstagoon is a Dark-Normal type, it can't get hit by Prankster moves, it can't get hit by Spectral Thief (a very popular move in the tier), and it gets STAB Power Trip. This set works well with sun support, so you have a 100% chance to activate Harvest at the end of the turn as opposed to a 50% chance. Once you get the ball rolling on this, it's practically unstoppable.

EXPLANATION:
- Substitute is essential to purposely chip yourself down to Starf Berry range. 244 HP EVs ensure that it takes exactly 3 Subs to activate the Starf Berry. It can also block some status moves and Imposter (a somewhat common and very annoying thing people run. the main way to block it is by being behind a substitute).
- Protect is always a good move for scouting out your opponent, blocking attacks, blah blah. It also helps when you're in Starf Berry range to fish for a Harvest chance.
- Shift Gear is used when you're behind a Sub and your opponent hasn't broken it yet. It also ensures that you can outspeed the opponent to safely get a Sub up, as well as boosting your offensive pressure.
- Power Trip is a busted move, especially in this tier. With just one Shift Gear, it's already base 80 power, and each Starf Berry boost increases the power by 40.

Sadly Zamazenta walls this set. I've had epic Obstagoon sweeps stopped by the shield doggo several times and it stinks.

Anyway, that's what goes through my head as I come up with these gimmicks. (I generally try to use underused/underrated moves and abilities.) Here's an accurate representation of me in this chapter: