Pokémon Red and Blue: Difference between revisions

In addition, all items with IDs greater or equal to 196 are considered HMs or TMs, and are handled in a special way. This means that the items with ID 251–255 are named TM51–TM55, and act as TMs. They actually teach exactly the same moves as HM01–HM05, to exactly the same Pokémon, because even though the valid HM items have IDs before the TM items, for all other purposes, the HM moves come after the TM moves in the game's internal data. However, since TM51–TM55 are considered as TMs rather than HMs, they are not key items (i.e. their quantities are displayed in the inventory, and they can be tossed or sold), and are consumed when used. ([[Cancel (Generation I 0xFF glitch item)ItemDex/RGBY:255|TM55]] has some further quirks because it has ID 255, which is also used as the terminator of item lists. Most notably, its name is rendered as "Cancel" in the inventory, and while on-screen it hides the items below it, although it can still be used, tossed, or sold because in those cases the game uses the item count byte to determine whether the player chose the Cancel button.)