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- (Generation I move)
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Miscellaneous glitches of Pokémon Red and Blue and Pokémon Yellow

Amazing Man (Red and Blue only)| Billʼs Secret Garden | Cable Club escape glitch | Celadon looping map trick | Coastal Flooding | Cooltrainer move | Evolve without an Evolution Stone (Red and Blue only) | Evolving Raichu (Red and Blue only) | Expanded item pack | Focus Energy glitch | Get stuck in a wall | Glitch battle systems | Glitch City RAM Manipulation | Infinite Blaine Door | Introduction Nidorino glitch (Red and Blue only) | Invisible PC (Red and Blue only) | Invisible Tree | Item stack duplication glitch | Mute the music in the Pokémon League | Partial trapping move link battle glitch | Pokémon Tower Pokédex glitch | PP Reset Glitch | Recovery move glitch | See a Ghost without a Silph Scope | Silph Co. PC Glitch | Stand on a Tree | Statue behaviour glitch (Red and Blue only) | Substitute glitch | Super effective move AI flaw (Red and Blue only) | Super Glitch | Surfing glitch | Transform into a Ditto | Trick Zone | Walk around with only fainted Pokémon (Red and Blue only) | Walking lag glitch | Walk on water through Surf | Walking Pikachu happiness glitch (Yellow only) | Wild appeared! | ZZAZZ Glitch

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Bulbapedia also has an article about - (Generation I move).
Viewing '-' on the Fight screen.

"-", nicknamed "CoolTrainer move", is a 'move' with an index number of hex:00 in Pokémon Red, Blue, Yellow. It is considered a glitch move when it is the first move in a Pokémon's list of moves. The name "CoolTrainer move" was taken from the name of its (probably constant) type; "CoolTrainer♀" in Pokémon Red and Blue for when no Super Glitch effect is caused.

On the Fight screen and a Pokémon's summary it is called '-', because this name is used for no move (also hex:00) in situations where a Pokémon knows less than four moves, but it acts as a glitch move when it's forced as the first move.

Upon using it, and when a PP Up is applied to it, its name is taken from the memory and is essentially random.

Obtaining '-' as the first move

In Pokémon Red and Blue, the swapping Transform moves glitch can be used to put '-' in the first position of the moves list if the number of moves after the transformation is greater than the number of moves before the transformation.

Example 1: Ditto normally only knows Transform, so if it transforms into a Pokémon with four moves, swapping the second move with the first will make it have CoolTrainer♀ as the first move after the battle.

Example 2: A Mew knowing only three moves including Transform can encounter a Pokémon with four moves and transform into it. Then, swapping the fourth move with the first move will give CoolTrainer♀ as the first move after the battle.

The swapping Transform moves glitch was fixed in Pokémon Yellow, however, the player can still trade a Pokémon with an accessible '-' over from Pokémon Red and Blue.

Certain glitch Pokémon know the CoolTrainer♀ move as their first starting move, and many can learn the CoolTrainer♀ move through level up, meaning that the first move can be replaced with it if the Pokémon already has four moves.

Theoretically arbitrary code execution can be used to obtain '-' as the first move, too.

0 initial PP and how to restore it

After obtaining '-' as the first move it may have 0/13 PP at first, and healing at a Pokémon Center won't restore its PP. However, if the player uses a certain PP restoring item (Ether or Max Ether only), it's possible to use the move.

Glitch Pokémon that know '-' as their first move

In Pokémon Red/Blue only

#250 family:

#000 family:

  • Fossil and Ghost Missingno. only, if one of the Pokémon above is the last Pokémon in the party, and the Pokémon screen is opened before capturing it. (hex:B6-B8)

Glitch Pokémon that know '-' through level up

Note that this data was generated from the ROM, and has not been verified.

In Pokémon Red/Blue

Glitch Pokémon Index number (dec) Level(s) it learns '-'
▶ A (hex:BF) 191 248
ゥ (hex:C1) 193 33
. 4 (hex:C2) 194 97, 123
POKéWTRAINER (hex:C4) 196 139
♀pゥ ゥ ゥ (hex:C7) 199 115, 219
PC 4S H (hex:CA) 202 28, 62
TRAINER (hex:CD) 205 181
W G d (hex:CE) 206 248
O PkMn4 X (hex:CF) 207 33
PkMn PkMn T (hex:D0) 208 22
4B 8 4 8 (hex:D1) 209 165
M p' u ゥ (hex:D3) 211 234
pゥ ゥ ゥ (hex:D5) 213 12, 13, 115, 131, 137
4 h (hex:D6) 214 4
PkMnRPkMn B (hex:D9) 217 6, 11
B (hex:DA) 218 3
(hex:DC) 220 3
7 PkMn 'v (hex:DD) 221 12, 13, 115, 131, 137
'v (hex:E1) 225 234
...... (hex:E2) 226 248
(hex:E4) 228 4, 33
C (hex:E5) 229 248
(hex:E6) 230 4
pゥ (hex:E7) 231 234
c (hex:E9) 233 3
(hex:EB) 235 38
h ゥ (hex:ED) 237 248
g (hex:EE) 238 33
94 (hex:F1) 241 12, 22
ゥ (hex:F2) 242 192, 248
ゥ (hex:F3) 243 28, 62
G 'Mp (hex:F6) 246 240
' N g ゥ (hex:F8) 248 12, 13, 115, 131, 137
94 h (hex:F9) 249 38
(hex:FA) 250 6, 22
O (hex:FC) 252 234
6ゥ (hex:FD) 253 248
'M (hex:FE) 254 3, 7, 15, 31, 63, 127, 255
'M (hex:FF) 255 28, 62

In Pokémon Yellow

Glitch Pokémon Index number (dec) Level(s) it learns '-'
4A 4 (hex:BF) 191 234
♀ . (hex:C1) 193 16, 22
(hex:C8) 200 7, 15, 30, 31, 127, 255
PkMn (hex:CE) 206 234
(hex:D0) 208 16, 22
(hex:D4) 212 22
' ゥ. (hex:D5) 213 12, 13, 51, 87, 115, 131, 137
PkMn (hex:D6) 214 4
(hex:D7) 215 97, 123
(hex:D8) 216 22
ゥ ' B (hex:DB) 219 16
4, ゥァ (hex:DD) 221 12, 13, 51, 87, 115, 131, 137
4 89 4 (hex:E3) 227 7, 15, 30, 31, 127, 255
8B 4 8 (hex:E4) 228 4, 33
Z ゥ (hex:E5) 229 234
9ゥ (hex:E6) 230 4
'r ゥ (hex:EA) 234 8
4 ( h 4 ?? (hex:ED) 237 234
h pゥ ゥ... (hex:EF) 239 3, 7, 15, 31, 63, 127, 255
' B' ゥ (hex:F1) 241 12, 22
ゥ A (hex:F3) 243 28, 62
ゥ (hex:F8) 248 12, 13, 51, 87, 115, 131, 137
Q (hex:FF) 255 234

Super Glitch effect

Super Glitch may be triggered with '-' when it is the first move by opening the fight menu or trying to move the cursor. After the Super Glitch effect occurs, the type of '-' may change from CoolTrainer♀ to something else.

Unlike other Super Glitch moves, only one buffer overflow occurs with '-' (at memory address $CF4B, but not $D0E1). No corruption is caused by the '-' move when viewing it from a status screen.

Triggering Super Glitch with '-' requires more luck than other Super Glitch moves, so the player may need to keep 'moving' the cursor or opening and closing the fight menu. After a certain point in the player's game, CoolTrainer♀ induced corruption may stop working, due to hex:50 characters appearing in its internal name too early. There is no known guaranteed way to fix this other than to use a different cartridge.

The most basic effect that can be triggered with the CoolTrainer♀ move is the TMTRAINER effect, by opening the 'PkMn' menu from within battle before viewing it in the 'Fight' menu. Triggering the TMTRAINER effect in Diglett's Cave will let you avoid a freeze immediately after the battle ends. Opening the start menu after the TMTRAINER effect happens and the battle ends may be required to avoid a freeze after exiting the cave.

With the TMTRAINER effect, the enemy Pokémon's species will change into a level 127 Missingno. (hex:32) if sprites are not flipped, and a level 127 Horsea is obtainable by catching the enemy Pokémon if the sprites are flipped. Though the Pokémon's sprite will not change to the new Pokémon until it is captured, its palette may change to that of the new Pokémon.

In Pokémon Red and Blue, more Pokémon can be obtained with '-' (and also Super Glitch) by viewing the Pokémon menu in specific places where there is a 'bottom-left corner of a bush' tile (hex:50) between y coordinates 09-0C (these are BGB coordinates; y starts as 00 at the top of the screen and increases the further down you go) before entering Diglett's Cave and triggering Super Glitch with '-'.

For an image showing where the bush tiles should be, and further information, please see this Youtube video by TheZZAZZGlitch.

Keep in mind that the start menu is added to the saved screen data, and the west most tiles of the start menu are between x=0A-13, so the 50 tiles replaced with start menu tiles don't count.

Effect of using the move

This effect ignores Super Glitch:

In Pokémon Red and Blue and Yellow, '-' acts as a damaging move with Fissure's animation that may freeze the game if it doesn't defeat the opponent.


A Pokémon with '-' as the first move can be traded to Pokémon Gold, Silver and Pokémon Crystal, where it will become - (Generation II move), because a Pokémon is not deemed 'abnormal' by its moves.