Fans use "legendary" as a catch-all for any rare, powerful, one-of-a-kind Pokémon, but the actual game data and competitive rulesets recognize at least four distinct categories, and mixing them up leads to real confusion about catch mechanics, distribution, and which formats a given Pokémon is even legal in. The distinctions below are drawn from how Game Freak classifies each Pokémon internally and how Smogon and official VGC rules treat them differently as a result.
Sub-Legendaries: Legendary-Classified, Not the Box Mascot
Sub-Legendaries are Pokémon that carry the game's internal Legendary flag but aren't the cover mascot of the version they appear in — the classic example is the Gen 1 Legendary birds, Zapdos, Articuno, and Moltres, alongside the Legendary beasts Raikou, Entei, and Suicune in Gen 2. These are generally catchable once per game copy through normal wild encounters (no distribution event required), often guard a fixed, hard-to-miss location, and typically appear in trio or duo groupings tied to a specific regional legend rather than being the single defining Pokémon of their game's box art. Later examples include the Regi trio, the Tapu guardians of Alola, and the Paradox Pokémon of Gen 9, which function as Sub-Legendaries despite being a newer design category.
Restricted / Box Legendaries: The Version Mascots
Box (or Restricted) Legendaries are the Pokémon whose artwork appears on the game's cover and whose story is the central plot of that version — Kyogre and Groudon for Ruby and Sapphire, Koraidon and Miraidon for Scarlet and Violet. Mechanically, these tend to have the highest stat totals and most format-warping abilities in the game (Primordial Sea, Desolate Land, Intrepid Sword), and Game Freak generally locks them to a single wild encounter tied directly to the main story, with no way to get a second one in the same save file outside trading or version-exclusive events. Because of their raw power, official VGC groups these under a "Restricted" designation in Restricted-format play.
Mythicals: Never Available in the Wild, Ever
Mythicals are the strictest category: a Mythical cannot be obtained through any normal in-game encounter in any main-series title, full stop. Every single one — Mew, Celebi, Jirachi, Arceus, and the rest — has only ever been legitimately acquired through a time-limited distribution event, a promotional serial code, or in some modern titles a guaranteed gift tied to owning the newest game. This site's dedicated Mythical ranking covers the full 22-strong list and how their distribution rarity shaped both their nostalgia value and, in a few cases, their actual competitive relevance. The defining trait is entirely about acquisition method, not raw power — some Mythicals (Arceus, Darkrai) are format-defining, while others (Phione-adjacent Manaphy aside, most low-BST Mythicals) are competitively minor.
Ultra Beasts: Powerful, Rare, and Officially Not Legendary
Ultra Beasts are a Gen 7 invention exclusive to the Alola games and their Gen 8 reappearances: extradimensional creatures that arrive through Ultra Wormholes, each given a code-name (UB-01 through UB-adhesive and beyond) alongside a proper species name like Nihilego, Buzzwole, or Blacephalon. Despite boasting stat totals and story significance comparable to Legendaries, Game Freak has never officially classified Ultra Beasts as Legendary Pokémon in the game's internal data or its own marketing language — they occupy a separate bucket entirely, which is why some Pokédex- or format-filtering tools that search strictly by "Legendary" flag will not return Ultra Beasts even though most players mentally group them together.
Paradox Pokémon: A Newer, Distinct Fifth Bucket
Gen 9 introduced Paradox Pokémon — ancient or future forms of existing species (Great Tusk as an ancient Donphan-adjacent form, Iron Treads as a future counterpart, and so on) that carry unusually high stat totals and a shared, exclusive ability family (Protosynthesis for the past-themed forms, Quark Drive for the future-themed ones) reminiscent of Legendary-tier power. Despite that stat ceiling, Game Freak has not flagged Paradox Pokémon as Legendary in the games' internal data, and outside of a small handful (the specific Paradox forms tied to Scarlet and Violet's own box legendaries, Koraidon and Miraidon, which do carry the Legendary and Restricted designations as their games' mascots) the rest of the Paradox roster is officially just a themed, high-stat regular species category, legal in standard non-Restricted formats the same way a Sub-Legendary is. This makes Paradox Pokémon a genuinely new classification rather than a reskin of an existing one — they don't cleanly map onto Sub-Legendary, Box Legendary, Mythical, or Ultra Beast, and treating them as a fifth bucket is the most accurate way to describe where they actually sit in both game data and format rules.
Ultra Beast Naming: Codenames Before Species Names
Every Ultra Beast is given a UB-prefixed codename — UB-01 Symbiont, UB-02 Absorption, UB-03 Lighting, and so on through the rest of the roster — used in-game and in official marketing material before the Pokémon's proper species name (Nihilego, Buzzwole, Xurkitree) is revealed, mirroring the real-world convention of assigning a provisional designation to a newly discovered specimen before it's formally classified. Some Ultra Beasts share a codename number with a letter suffix to denote closely related forms (UB-02 Absorption and UB-02 Beauty both referring to different members of the Buzzwole/Pheromosa pairing's discovery), which is a naming quirk unique to Ultra Beasts among all of the categories on this page — no Sub-Legendary, Box Legendary, or Mythical has ever used a provisional codename system in official materials, since those categories are generally revealed with their final species name from the start.
Why the Community's "Sub-Legendary" Term Doesn't Match Game Freak's Own Flagging
"Sub-Legendary" is entirely a community-coined shorthand — it does not appear as a distinct internal flag in the games' own data the way the Legendary and Mythical flags do. Internally, Game Freak's games mark a Pokémon as Legendary or not, full stop, with no separate sub-tier recorded anywhere in that data; a Zapdos and a Koraidon carry the identical Legendary flag despite the community consistently treating them as different tiers of importance and power. The Sub-Legendary/Box-Legendary split exists purely because fans and, eventually, competitive rule-makers needed a practical way to distinguish 'story-critical, single-copy, cover-mascot-tier' Pokémon from 'still flagged Legendary but obtainable via a normal wild encounter alongside a trio or duo' Pokémon, and VGC's own Restricted-format rules effectively codified that fan distinction into an official competitive ruleset even though the underlying game data never made the split itself. This is worth knowing specifically because searching a Pokédex app or dataset for "Sub-Legendary" as a literal flag will usually return nothing — it's a classification layered on top of the real data, not part of it.
How the Four Categories Compare
Put side by side, the practical differences come down to three questions worth asking about any unfamiliar rare Pokémon: can you encounter it in the wild at all, is a second copy obtainable in the same save file, and does it carry the game's internal Legendary flag. Those three answers alone predict almost everything else about how a given Pokémon will behave — its format legality, whether it shows up in a Legendary-filtered Pokédex search, and whether missing it in one game version means waiting for a distribution event or simply catching it again on a second save file.
| Category | Wild Encounter? | Example | Official Legendary Flag? |
|---|---|---|---|
| Sub-Legendary | Yes, once per save typically | Zapdos, Suicune, Tapu Koko | Yes |
| Restricted / Box Legendary | Yes, tied to main story, once per save | Kyogre, Koraidon | Yes |
| Mythical | Never — distribution only | Mew, Jirachi, Arceus | Yes (separate Mythical sub-flag) |
| Ultra Beast | Yes, Ultra Wormhole encounters (Gen 7) | Nihilego, Blacephalon | No |
Competitive Format Rules for Each Category
Standard, non-Restricted VGC formats and most Smogon tiers below Ubers ban both Mythicals and Restricted/Box Legendaries outright — they simply aren't legal picks. Sub-Legendaries are generally allowed in standard formats since their power level, while strong, doesn't reach the same ceiling as a box mascot. Official VGC's Restricted format is the exception built specifically around Box Legendaries: it typically caps a team at one or two Restricted Legendaries (the exact number has varied by season, most commonly landing on two), forcing players to build the rest of the team around support and answers for their own and the opponent's picks rather than stacking as many Restricted-tier threats as possible. Ultra Beasts, lacking the Legendary flag, are treated as ordinary Pokémon for format legality purposes and have appeared in standard, non-Restricted VGC play when their stats warranted it.
Why the Distinction Actually Matters
Beyond trivia value, knowing which category a Pokémon falls into answers practical questions before you touch a damage calculator or a team sheet: whether it's even legal in the format you're building for, whether a second copy is obtainable without trading, and whether its distribution history means a specific game version's Pokédex is permanently missing it without external transfer. A newer player assuming every powerful rare Pokémon follows the same rules will get tripped up the first time they try to catch a second Mythical in the wild, or wonder why an Ultra Beast doesn't show up when they filter a Pokédex app by "Legendary."