Faces:
☹️☺️☠️

Hands:
✌️ ☝️ ✍️ ✋

Zodiac Signs:
♓️ ♒️ ♑️ ♐️ ♏️ ♎️ ♍️ ♌️ ♋️ ♊️ ♉️ ♈️

Religious Symbols:
☸️ ☯️ ☮️ ☪️ ✝️ ⛎️ ⚛️ ☦️

Math:
✖️ ➗ ➖ ➕ ♾️

Sports:
⛸️ ⛷️ ⛹️ ⛳️ ⚾️ ⚽️

Check Marks & Xs:
❎ ✅ ☑️ ✔️ ❌

Arrows:
⤵️ ⤴️ ↩️ ↪️ ↖️ ↙️ ↘️ ↗️ ⬇️ ⬆️ ⬅️ ➡️ ◀️ ⏏️ ⏯️ ⏮️ ⏭️ ℹ️ ⏬ ⏫ ⏪ ⏩ ▶️

Shapes:
◾️ ◽️ ◼️ ◻️ ▫️ ▪️ ⚫️ ⚪️ ⬜️ ⬛️

Card Symbols:
♦️ ♥️ ♣️ ♠️ ❣️ ❤️

Warning:
☣️ ☢️ ⚠️ ⁉️ ‼️ ❔ ❓ ❕ ❗️ ⭕ ⛔

Gender:
♂️ ♀️

Bussiness:
™️ ®️ ©️ ♻️ Ⓜ️〽️

Sparkles & Stars:
✨ ⭐️ ☀️ ❇️ ✴️ ✳️

Weather:
☁️ ⛅️ ☄️ ⚡️☔️ ❄️⛄️ ☂️⛈️

Clocks:
⏲️ ⏱️ ⏰ ⌚️

Medical:
⚕️⛑️

Asian:
㊙️ ㊗️ ♨️ ⛩️ ➿️ ➰️

Other:
⚜️ 〰️ ⛴️ ⛱️ ⛰️ ⛪️ ⛺️ ⛲️ ⛽️ ⚓️ ⛵️ ✈️ ☘️ ⚗️ ⛓️ ⚒️ ⚔️ ⛏️ ⚱️ ⚰️ ♟️ ☕️ ✏️ ✒️✂️ ✉️ ⚙️ ⚖️ ⌛️ ☎️ ⌨️

Scratch Codes:
Type these for scratch emojis!
(if there is a space, remove it. its only so the forums don't make it look like )

_meow_ (scratch cat)
_gobo_ (gobo)
_=^..^=_ (classic cat face)
_: )_ (a smiley faced cat)
_: D_ (a happy cat)
_B)_ (a cat with sunglasses)
_: P_ (a cat with its tongue sticking out)
_;P_ (winking cat with its tongue sticking out)
_:'P_ (a crying laughing cat)
_P:_ (a cat on its head)
_:3_ (a cat with its eyebrow raised)
_<3_ (a cat with heart eyes)
_**_ (a cat with star eyes)
_: ))_ (a cat throwing up rainbow)
_: D<_ (a cat eating pizza)
_10mil_ (a celebration popper)
_waffle_ (a waffle)
_taco_ (a taco)
_sushi_ (sushi)
_apple_ (an apple)
_broccoli_ (broccoli)
_pizza_ (a slice of pizza)
_candycorn_ (a piece of candy corn)
_map_ (a map)
_camera_ (a camera)
_suitcase_ (a suitcase)
_compass_ (a compass)
_binoculars_ (a pair of binoculars)
_cupcake_ (a cupcake)
_pride_ (a pride flag)
_blm_ (3 hands of different races)
_ksllxmfcai_ (changes your text to say “triangle eye” only on non-april fools days)

It's really nice that you want to help out with a guide! However, we have a number of them in the forums already and we don't have a good way to showcase any more. If you want to make a guide in a Scratch project, that would be fine. You could advertise it in the “Show and Tell” section too.

There are lots of other ways to help out in the forums too. Helpful Scratchers are always welcome in the “Questions About Scratch”, “Help With Scripts”, “Requests” and other sections. Just look around and ask questions