What should I have if I've done everything?

If you're going for a 100% playthrough of the game, here's what I've got. I've played through the Hero Mode and gotten just about everything I possibly can AFAIK and defeated the final boss. There is nothing else that I can do in the game except maybe find a few Sheikah Stones hiding off somewhere or some missing Goddess Walls.

WARNING: *SPOILERS* AHEAD

First of all in the Collection page of your inventory, you should have everything in the purple section checked off.

• You should have delivered Cawlin's letter.
• You should have done something about Beedle's missing bug.
• You should have retrieved the missing Rattle.
• You should have gotten all Gratitude Crystals (there's 80) to Batreaux and turned him into a human.

Then in the main Gear page, here's everything starting from the left.

• You should have the Master Sword with all 3 flames:
  • Top: Din's Flame
  • Right: Farore's Flame
  • Left: Nayru's Flame
• You should have found all the Pieces of Heart in the game. It should appear as a full heart and not empty or partially filled. Without the 2 Life Medals equipped, you should have 18 Hearts at the end of the game for a grand total of 20 Hearts.
• You should have the Tycoon Wallet given to you by Batreaux with 3 Extra Wallets (giving 900 Rupee capacity) purchased from Beedle.

• You should have 8 Dowsing slots total with 6 of them filled:
  • Top-Left: Rupees
  • Top-Right: Treasure
  • Right: Hearts
  • Bottom-Right: Goddess Cubes
  • Bottom: Look Around
  • Bottom-Left: Gratitude Crystals
• You should have 8 slots available in your Pouch.
• You should have 8 Items total in their upgraded forms:
  • Top-Left: Gust Bellows
  • Top: Sacred Bow (2 upgrades)
  • Top-Right: Bomb Bag
  • Right: Tough Beetle (2 upgrades)
  • Bottom-Right: Big Bug Net (1 upgrade)
  • Bottom: Scattershot (1 upgrade)
  • Bottom-Left: Clawshots
  • Left: Whip

• You should have the fully assembled Triforce.
• You should have the Stone of Trials.

• You should have the Goddess Harp with all 5 songs:
  • Top: Song of the Hero
  • Right: Farore's Courage
  • Bottom-Right: Din's Power
  • Bottom-Left: Nayru's Wisdom
  • Left: Ballad of the Goddess
• You should have the Sailcloth.
• You should have the Water Dragon's Scale.
• You should have the Fireshield Earrings.
• You should have the Mogma Mitts.

Finally, for the items:

• You should have 5 Bottles.
• You should have a Braced Shield (2 upgrades)
• You should have a Fortified Shield (2 upgrades)
• You should have a Goddess Shield (2 upgrades)
• You should have the Hylian Shield*
• You should have a Large Seed Satchel.
• You should have a Large Bomb Bag.
• You should have a Large Quiver.
• You should have 2 Life Medals.
• You should have 2 Heart Medals.
• You should have 2 Rupee Medals.
• You should have 1 Treasure Medal.
• You should have 1 Cursed Medal.
• You should have 1 Potion Medal.
• You should have 1 Bug Medal.

_{* I actually don't have the Hylian Shield, getting it in Hero Mode is TOUGH!}

Some other things worth noting:

• The Goddess Statue should now be on the surface at the Sealed Grounds.
• Beedle's shop should be completely sold out.
• You should see Batreaux in human form at the Bazaar during the day.
• The Pumpkin Pull should be available to you in front of the Sparring Hall after helping Fledge.
• Dodoh's High Dive should be available to you at Fun Fun Island after helping Dodoh.
• Bug Heaven should be available at Bug Rock.
• Clean Cut should be available at Bamboo Island.
• Thrill Digger should be available at Eldin Volcano.
• Rickety Coaster should be available at Lanyru Desert at the Shipyard.
• The Thunder Dragon's Lighting Round should be available at Lanyru Desert at the Lanyru Gorge.

That's about it. I'm pretty sure this is everything there is in the game.