Cheats
Pikablu
Here is all about how to get Pikablu the water mouse!
Missingno
Missingno, the classic (Supernerd's favorite)
Glitch City
Still figuring this one out
Fusions 
You can see fusions but you can't play with them
Other cheats
That's all I have for right now. I don't have a lot of time between classes to write about this stuff so if there's something you want me to write about sooner please let me know!!
My friend's notebook is massive and she doesn't like me going through it all the time, but here's some ones I can remember:
- Pokegods
- Mist Stone
- Raineon
- Yoshi and Luigi (dumb)
- Dust in Pewter City (boring)
- Weird Pokemon NPC in Cinnabar lab
- Bill's Secret Garden