Lots of questions here, which is good, but some are repeats and kind of annoying, so I've taken the time to compile this list of threads that have been solved. Please realize there are over 900 threads in this subforum. Not everything is listed yet. I've gone through 2 of 19 pages so far.

Also, please please please take a quick look at the wiki if you're trying to do something that should be simple enough to do. There's plenty of information there for you to look at. Including formats and explanations for them. The forum is not a place to dump your questions for others to answer! It should be your last resort!

Link To Wiki

You should check the search function as well, it's a real life saver: http://www.pokecommunity.com/search.php?f=244

Overworld

How Can I add 8-way Movement?
Bridges over water
Connection Issues
Remove Water reflections
NPC checks for badges
Timer-based events
Changing certain tiles on map
Force pokemon to PC Box (silently)
Event won't move
Setting up Trainer Eyes
Setting Battle Music for specific map
Pokemon Follow Player
Change Tileset based off of time of day
Screen turns black when map transfers
How to make Ledges work

Battle

Time-based water encounters
Making ability increase a stat
Change Pokémon Position in Battle
Uncatchable Wild Encounter
Creating new trainers
Game continues even if you lose
Sprite bobbing in battle
Setting up VS. Animations
Wild Pokémon Temporary palette (sliding into position)
Fixing Battle Sprite GIF Animations

Pokémon

Problem viewing forms
Defining new moves in moves.txt
Adding new types (Wiki Link)
Adding new species
Make Pokémon untradable, storable, or releasable
Quick Egg Hatch
Pokemon Forme Based on held item
Evolution Triggered by Status Ailment
Gender-based Moveset

GUI

Changing Layout of Pokegear buttons
10-Character Bypass Limit
Changing the controls
Animated GUIs via .gif
Removing Area Feature of pokedex

Misc.

Adding more languages
Using Items as HM/TMs (Fly or Cut for example)
Adding item that changes Player ID (Boy to girl for example)
Change Default Text Color
Adding new Pokeballs
Trading items for items

Errors

Can't create trainer (Essentials 12 error)
Editor cannot compile levels over 100
"Uninitialized constant PBMoveRoute" error
New move animation won't play (compile issue)
Debug Menu Opens Automatically (F9 Error)

Nice job, although this is probably impracticable to maintain updated.

I always save useful information in my PC since the Poccil era in his huge thread..

I like answers/procedures that can be reused for people that have the same questions, some sites that follow this way became very successful like stackoverflow. I believe that the best way of done this here is to make a tutorial for the more detailed answers/procedures and link the answer on the thread to the tutorial. I does this several times and believe that is the best way to help more people.

Certain content of some threads that you listed can be converted to useful tutorials and will help more people like:

-How Can I add 8-way Movement?
-Force pokemon to PC Box (silently)
-Randomized Map Music
-Uncatchable Pokemon
-Non-Removable Pokemon

And I agree and support your wiki tip.

Thank you. I will probably write some tutorials when I have more time, but I think this is a good start. I agree that the more common questions should have tutorials made, but from what I've seen many just come here to dump a question the second they get an error. (I know, because I used to do it lol)