Glitch City Laboratories Archives

I wonder if the cuttable trees are also missable objects? But you wouldn't be able to trainer-fly from route 9 without being able to get on route 9 in the first place.

Alternatively, there might be a way to get a fresh water/lemonade/soda pop without going to celadon city first. Then you could simply go right through saffron city to get to celadon and lavander. Actually, I'm sure there's a way, I just don't know it myself, and I don't recall seeing it posted anywhere. Maybe ask around a bit?

Have you shown Brock Through Walls yet? If that's not an option you could show Item Underflow and hope the RAM gives you one of the drinks, it's how I got the Surfboard :D

I wonder if the cuttable trees are also missable objects? But you wouldn't be able to trainer-fly from route 9 without being able to get on route 9 in the first place.

I wonder if the cuttable trees are also missable objects? But you wouldn't be able to trainer-fly from route 9 without being able to get on route 9 in the first place.

Cuttable trees are tiles changing, as shown by the previous investigation on GC-based RAM maps. I am not sure if there is also a missable object for them, although the collision must be dealt somehow.

I wonder if the cuttable trees are also missable objects? But you wouldn't be able to trainer-fly from route 9 without being able to get on route 9 in the first place.

Cuttable trees are tiles changing, as shown by the previous investigation on GC-based RAM maps. I am not sure if there is also a missable object for them, although the collision must be dealt somehow.

I don't exactly know how the game does this, but anyways.

When you try tou cut a tree, it checks whether you are facing a tree / grass tile, and if yes, it looks up in a table to replace the tree / grass tile with a normal earth tile while preserving three of its neighboring tiles (the game, for compression purposes, stores tiles in squares of 2x2 tiles). That's what we use for Glitch City RAM Manipulation.

Every time you enter a new map, the game actually copies the whole map from ROM to RAM, and applies modifications such as cutting trees, discovering the Casino's stairs, etc (nb : the reloading of these maps don't involve reloading the graphics, causing the Invisible Tree Glitch[/url). These modifications don't involve any sprites at all.

tl;dr : nope, trees aren't missable objects. They are part of the map.

ISSOtm, I edited your post to fix a BBCode issue ([tt][/tt] wasn't closed properly)

(…)

I don't exactly know how the game does this, but anyways.

When you try tou cut a tree, it checks whether you are facing a tree / grass tile, and if yes, it looks up in a table to replace the tree / grass tile with a normal earth tile while preserving three of its neighboring tiles (the game, for compression purposes, stores tiles in squares of 2x2 tiles). That's what we use for Glitch City RAM Manipulation.

Every time you enter a new map, the game actually copies the whole map from ROM to RAM, and applies modifications such as cutting trees, discovering the Casino's stairs, etc (nb : the reloading of these maps don't involve reloading the graphics, causing the Invisible Tree Glitch[/url). These modifications don't involve any sprites at all.

tl;dr : nope, trees aren't missable objects. They are part of the map.

ISSOtm, I edited your post to fix a BBCode issue ([tt][/tt] wasn't closed properly)

Thanks ! Dante's quote also features the typo.

(…)

I don't exactly know how the game does this, but anyways.

When you try tou cut a tree, it checks whether you are facing a tree / grass tile, and if yes, it looks up in a table to replace the tree / grass tile with a normal earth tile while preserving three of its neighboring tiles (the game, for compression purposes, stores tiles in squares of 2x2 tiles). That's what we use for Glitch City RAM Manipulation.

Every time you enter a new map, the game actually copies the whole map from ROM to RAM, and applies modifications such as cutting trees, discovering the Casino's stairs, etc (nb : the reloading of these maps don't involve reloading the graphics, causing the Invisible Tree Glitch[/url). These modifications don't involve any sprites at all.

tl;dr : nope, trees aren't missable objects. They are part of the map.

I thought that the trees were actually sprites like in gen3 O_O

Here they are in the Pokéred disassembly :
https://github.com/pret/pokered/blob/6057f285ad1a930315d1a45fa3d1aa08efe6801d/wram.asm#L2619
and the entry I just added to Datacrystal :
http://datacrystal.romhacking.net/wiki/Pok%C3%A9mon_Red/Blue:RAM_map#Event_Flags

I'm currently researching what does each flag control.
This routine seems to be a good one to target.

Thanks, but what I'm looking for is a way to trigger a Mew Glitch encounter on a map with only two disappearing NPCs.