Roaming Pokémon encounter glitch

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Major glitches of the Pokémon series

Arbitrary code execution

0x1500 control code arbitrary code execution (Crystal) | Cart-swap arbitrary code execution | Generation I custom map script pointer | Generation I invalid meta-map scripts | Generation I item ("8F", "ws m", "-g m", "5かい", "てへ" etc.) | Generation I move ("-", "TM42") | Generation I Trainer escape glitch text boxes | Generation II bad clone | Generation II Burned Tower Silver | Japanese Crystal Pokémon Communication Center SRAM glitches | Coin Case glitch | Generation II glitch Pokédex sortings | Pikachu off-screen glitch ACE | OAM DMA hijacking | Pikachu glitch emote | Generation III glitch Pokémon summary | Generation III glitch move animation) | Remote code execution | TM/HMs outside of the TM/HM pocket | ZZAZZ glitch Trainer FC

No further extensions

Cloning | Item duplication glitch (Generation I) | Pokémon merge glitch ("Q Glitch", Generation I) | Time Capsule exploit | Bug-Catching Contest data copy glitch (Generation II, Japan only) | Berry glitch | Battle Tower Lati@s glitch (Generation III) | (Mimic) Transform Rage glitch (Generation IV)

Transform held item glitch (Generation IV, Japan only) | Mimic glitch (Generation IV, Japan only)

Buffer overflow techniques

99 item stack glitch | LOL glitch | Rival LOL glitch | Instant LOL glitch | RAM LOL glitch | Out of bounds LOL glitch | blockoobLG | Instant encounter infinite chain glitch | LGFly | Super Glitch (Generation I) | Party remaining HP glitch | Super Glitch (Generation III) | Text pointer manipulation mart buffer overflow glitch | CoolTrainer♀-type move | Double distort CoolTrainer♀ corruption | Yami Shop glitch | Party Pokémon box data shift glitch | Unterminated name glitch item instant encounter (Japanese Red/Green)

Item stack duplication glitch (Generation I)

Generation I expanded items pack (Glitch Rocket HQ maps, Map FE (English and non-English European Yellow) | Map script pointer manipulation (arbitrary code execution | Map script pointer item ball manipulation) | Text pointer manipulation (arbitrary code execution | Item ball manipulation | Mart buffer overflow) | Trainerless instant encounter glitch

Bad clone glitch (Generation II)

????? party overloading (Type 0xD0 move glitch | ????? map corruption | Celebi trick | Celebi Egg trick | Shiny Celebi trick | Glitch move map corruption | Overloaded party map corruption | Glitch Unown (Glitch Unown map corruption) | Duplicate key items glitch (Infinite items and item creation, Expanded Balls pocket (Wrong pocket TM/HMs, Glitch Pokédex categories))

Closed menu Select glitches (Japanese Red/Green)

Dokokashira door glitch (International) | Fossil conversion glitch (international) | Second type glitch | Skip to Level 100 glitch | Trainer mutation glitch | Walk through walls (International) | Lift glitch | Badge describer glitch

Pomeg glitch (Generation III)

Pomeg data corruption glitch ("Glitzer Popping") | Charm glitch

Voiding (Generation IV)


Broken escalator glitch (Japan only) | Elite Four door glitch (Japan only)

2x2 block encounter glitches (Generation I)

Left-facing shore tile glitch (in-game trade shore encounter trick, Old man trick, Trade link up shore encounter trick, Fight Safari Zone Pokémon trick) | Viridian Forest no encounter grass tiles glitch

Glitch City

Safari Zone exit glitch | RAM manipulation | Out of bounds Glitch City (Generation II) | Slowpoke Well out of bounds corruption (French Gold/Silver/Crystal)

Large storage box byte shift glitch

Storage box remaining HP glitch | Generation I max stat trick

Pikachu off-screen glitch

Trainer corruption glitch

SRAM glitches

Generation I save corruption | 255 Pokémon glitch | Expanded party encounter table manipulation (Generation I) | Send party Pokémon to a new game (Generation I) | Generation II save corruption | Mailbox glitches | Mystery Gift item corruption | Trainer House glitches

Trainer escape glitch

Death-warp | Ditto trick | Experience underflow glitch | Mew trick | Text box ID matching | Meta-map script activation

Walk through walls

Ledge method | Museum guy method | Rival's effect | Select glitch method (International Select glitch method), Brock Through Walls

Surf down glitch

Grass/rock Surfing glitch (Spanish/Italian only) (adaptions: Submerge glitch (international)) | 8 8 (0x7C) grass/rock surfing glitch (English Red/Blue))

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Bulbapedia also has an article about Roaming Pokémon encounter glitch.
The glitch can be used to obtain both rare Pokémon and Pokémon at Level 100, however this will sacrifice the roaming Pokémon (Latios or Latias).

Not to be confused with the Roaming Pokémon IV glitch and Roaming Pokémon Roar glitch.

The roaming Pokémon encounter glitch, also known as the Battle Tower Lati@s glitch is a major glitch in Pokémon Ruby and Sapphire. It does not work in Pokémon Emerald.

The glitch allows the player to capture Pokémon from a Trainer with at least two Pokémon on their team, including an ordinary Trainer or a Battle Tower Pokémon such as level 100 Linoone, Hariyama, Dustox, etc.

The Pokémon from the Battle Tower can be nicknamed and will not turn into a Bad Egg, but the Pokémon from other Trainers may become Bad Eggs.

However, you can exploit this to spread Pokérus by battling with the Bad Egg in the party, because after the battle ends the Pokérus has a chance to spread (even though the original affected Pokémon was a Bad Egg).


The glitch was reported in Japanese Ruby, but actually works in both US releases of Ruby and Sapphire.

The roaming Pokémon encounter glitch was documented in 2012 in Japanese by an anonymous 2ch user. volty706 mirrored the conversation on their blog, calling it the "wandering glitch" (Japanese: 徘徊バグ).

On August 1, 2014, G- Mizuka uploaded a video showing the glitch in Japanese Pokémon Ruby.

On July 17, 2014, SailorJupiter confirmed that the Latios glitch in fact works for US English Ruby in addition to the Japanese version.


To perform this glitch, the player must lose (or win?) against a Trainer with at least two Pokémon, and then encounter Latios or Latias without encountering another Pokémon in between (very important).

The player should defeat the Latios/Latias, and this will cause a "PkMn Trainer" with a blank name with a team based on the Battle Tower Trainer you lost against to send one of two of their Pokémon (the game thinks that you KOd one of them).

This Pokémon will flee like Latios/Latias, so it is a good idea to use Mean Look or Spider Web against them if you cannot catch one with a Master Ball. If that Pokémon is defeated, the Trainer will send out another one of their Pokémon, which can be captured and can flee like the first Pokémon after Latios/Latias faints.

If the Trainer is defeated, no victory text will appear. The player can gain experience from the Battle Tower Pokémon if a Pokémon participated that is below level 100, and if that Pokémon gains experience, the wild Pokémon victory music may play and stick, even if the battle hasn't ended yet.

The origin of a Pokémon obtained from a Battle Tower Trainer is stated to be "BATTLE TOWER (met)".

Other credits

  • ChickasaurusGL (article text, with permission)

YouTube videos

YouTube video by ChickasaurusGL

YouTube video by G-Mizuka