What are all of the Pokemon with a 1% encounter rate?

I know there was a question asked just like this for Crystal, but I’d like to know this for all of the Pokémon games.

Pleaselog inorregisterto add a comment.

Notes:The listed Pokemon are in alphabetical order for each game. Each Pokemon is followed by the routes/areas where they have a 1% catch rate, and their encounter method. If applicable which game it occurs in and/or the Time of Day will also be listed.Itdoes notlist all the areas where those Pokemon can be encountered, only the locations where their encounter rate is 1%. For example, Raticate does have a 1% encounter rate on Route 11 in Yellow, but it has a 5% catch rate on Route 18, so only Route 11 is mentioned. Only the main series games are included.

Since Red/Blue and Yellow have very different catch lists and percentages, I have divided this list between those two games. In this generation, none of the fishing rods have a 1% chance to get anything, so all of the following Pokemon are encountered either in Grass, or by Walking in caves or buildings.

There were a lot of 1% encounter Pokemon in Red and Blue. Most of these are evolved Pokemon that are very rare in one version, but a lot more common in the other. Doing this did mean that these games had (theoretically) less version exclusives than later entries, but some of the Pokemon that were available were a lot harder to get in one version than the other. The main exceptions to this is, of course, the nightmarish task of catching certain Safari Zone encounters (especially Chansey!).

Yellow had less 1% encounters than Red and Blue, but this is largely because it is only a single game, and so avoided the “version exclusive” encounters of the other Generation I games.

Generation II did add several new methods to encounter Pokemon (Rock Smashing rocks and Headbutting trees), but none of these gave encounter rates of 1%. Several new mechanics that altered encounter rates were introduced, however - Time of Day and Swarms - and these did affect Pokemon with a 1% encounter rates. For Time of Day, the Pokemon in question were generally a lot common at another time of day (e.g. Quagsire and Zubat are both more common at Night). Swarms are more interesting, as that meant that at certain times Pokemon with very low encounter rates were a lot more common for a short period of time. Of the 1% Pokemon, this could affect Yanma, Dunsparce, Marill, and Snubbull, so those Pokemon’s encounter rates assume that there is no swarm of them at the time.

Note that Area 5 of the Safari Zone is the area to the far southeast, and is only accessible after entering the Hall of Fame.

Note that for Unown certain letters only have a 1% chance of spawning. Specifically, these are the ‘?’ ‘!’ and ‘O’ Unown symbols.

Several new methods of catching Pokemon were added in this generation, as well as the return of the previous capture methods. The ones that have 1% chance to encounter a Pokemon are Honey Trees and the Poke Radar. The Poke Radar is only given after getting the National Dex. Honey is a very annoying method. There are 21 Honey Trees in the game, but 4 will have a different encounter list than the other 17. To differentiate between these (when required) the 4 different Honey Trees will be called “Honey Tree (Special)”. Which Honey Trees are special will be randomly chosen for every new game, however. The Honey Tree Pokemon with a 1% chance will have no locations given, since they can be encounter in any Honey Tree or Special Honey Tree.Swarms again return, as well, which still increases the chance of encountering some of the listed Pokemon for a short period of time.

There are very few 1% encounter Pokemon in either of the Unova games. Aside from those mentioned below, most encounters have a minimum of 5% chance to encounter (or 2.5% chance if you want to take into account the gender differences of Pokemon like Jellicent or Unfezant). In addition to the 1% encounters below, Tynamo is the only other one with a lower encounter chance (2% on several of the floors of Chargestone Cave).

I think the lack of rare encounters is due to the introduction of the “special” encounter methods. Whenever you are are near grass or water, or in a cave, there is a small chance of rustling grass, rippling water, or dust clouds, respectively, appearing. These “special” encounters contain different Pokemon than are normally found on the route. If a Pokemon in a “special” encounter has a 5 or 10% chance to appear, then you could still be searching for it for a very long time, so it really may as well be a 1% chance.

Seasons may also change the encounter rate for some Pokemon (usually just between Winter and the rest of the seasons). Every month is a new season (so the cycle doesn’t match the actual seasons in the real world).

This answer is continued in a separate post below.

1st GenerationRed and Blue

Yellow

2nd GenerationGold, Silver and CrystalSnubbull, Route 38Quagsire, Route 26Chansey, Routes 13, 14 and 15Marill, Mt. Mortor 1FDunsparce, Dark Cave (near Violet city)

5th GenerationBlack and WhiteCryogonal, Twist Mountain 1FDragonite, Dragonspiral Tower Moat (Fish, Special)

Work in progress.

This is a continuation of my answer above. I hit the maximum word limit, so it wouldn’t let me post everything as one answer.

Most of these Pokemon have forms that only have a 1% chance of appearing, but they have other forms that appear more commonly. This means that Pokemon like Flabebe, Pumpkaboo, and Rotom may not truly have a 1% chance of appearing, but certain forms of those Pokemon do.

There are very few 1% chance Pokemon in ORAS, and a lot less than the original Ruby and Sapphire. I have no included any of the special encounters you can get through the Dex Nav after beating the Elite 4, simply because their percentages have not been confirmed (at least not on Bulbapedia).

And with that this list is finally finished!

Sources: Searching through the individual route and location pages on Bulbapedia.