R/B/Y Minor Glitch

[Zach the Glitch Buster]

Go to cycling road from Celadon City and go the the left border with the trees behind the stone pillars. Go down the hill for about 1 second and go back up. The trees, up to behind the guy two spaces away from the border, will have turned into water! Go back down(or to the right and back left) and there will be trees again! Note: this only works between two points: the biker specified above and a pillar to the right, the last one before going futher right to border the lake.

[Tombstoner]

I have done this a lot. It works.

[Zach the Glitch Buster]

Approved then

[JaggedMan]

I'm not sure if you know this one, but there is a glitch water tiles in the Cycling road. Here is how to do it.

 stand right here Then go down till you see water and go up to where you were. It should look like this.

[Tombstoner]

I don't see this on the site or the wiki, so I'm gonna approve this.

[Zach the Glitch Buster]

Added to the wiki and combined with other topic about this same glitch. No pictures on the wiki page though. We could use the ones here. 

[GARY 'M 9]

There's like... a lot more instances of this than just in Cycling Road.  There's near Pallet Town, somewhere in Seafoam Islands near Articuno, Below Cerelean, etc.

Also, try to take SGB screenshots of these pictures, please.