Most Likely Target: You are looking for "Pokemon Emerald (Trashman Version)" or a hack specifically credited to him.
The region of Hoenn is distorted. Littleroot Town's lab has a broken computer with a terminal that displays ASCII art of a Trash Can. Professor Birch is replaced by a sprite called "Old Man Utrash," who speaks in binary. If you translate the binary, it reads: "Do not catch them all. Let them rot." 1986+pokemon+emerald+utrashman+rom+exclusive
Instead of a held item, every wild Pokémon in this ROM has a "Trash Slot." You can give them useless items like "Broken Battery" or "Moldy Berry." If you collect 256 Trash items, you unlock a secret battle against a level 255 Utrashman that has the stats of a 1986 mainframe computer. Most Likely Target: You are looking for "Pokemon