Tangela in depth
Beneath it is a question, not a face
The design is by Ken Sugimori and draws from several sources at once. Bulbapedia points to the swamp monster from It!, Theodore Sturgeon's short novel, and William Hope Hodgson's algae creatures; also to Selaginella lepidophylla, the plant that rolls in on itself until it forms a ball. And to Medusa, something confirmed by the name it had in the English beta version of Red and Green: Meduza. Above all that is the Green Man motif, the face framed by leaves and branches, except that here the face never appears.
The Spanish and English names are the same, tangle plus the taxonomic suffix -ella. The Japanese name, モンジャラ, combines three things: “monster”, もじゃもじゃ (mojamoja, shaggy) and 毛むくじゃら (kemukujara, covered in hair). The '97 Spaceworld demo suggests it once had a pre-evolution, モンジャ (Monja), a small, dark creature with only one visible eye. It never made it out of the prototype.
The Special that split in two
In Generation I, Special Attack and Special Defense did not exist separately: there was a single Special stat, and its value was 100. Added to its 115 Defense, that made it a wall on both sides with just one good figure.
Generation II split that stat in two, and that broke its distribution. It was left with 100 Special Attack and 40 Special Defense, one of the most pronounced imbalances created by that change. That is why the special half of its sheet looks like an oversight today: it is not one, but the inheritance of a mechanic that no longer exists.
From Route 21 to Paldea's empty slot
In Red and Blue, it is found on Route 21, between Cinnabar Island and Pallet Town, or obtained by trading for a Venonat in the Cinnabar Island laboratory. In Yellow, it moved to the Safari Zone. Johto distributes it across Routes 21, 28 and 44 and Mt. Silver; Ruby and Sapphire left it out, while FireRed and LeafGreen returned it to Route 21 and Treasure Beach.
Then come the Great Marsh in Platinum, Route 13 and Giant Chasm in Black 2 and White 2, the Friend Safari in Generation VI, the Forest of Focus and Max Lairs in the Sword and Shield expansion, the Grand Underground in Brilliant Diamond and Shining Pearl, and the Crimson Mirelands and Cobalt Coastlands in Legends: Arceus, which is where this entry's movelist comes from. It is not in Scarlet and Violet, nor in Legends: Z-A: Generation IX is the first in which it cannot be obtained in-game. Its absence has made little noise, even though in the Kanto Pokédex it was the only pure Grass type: the rest carried Poison as a secondary type, or Psychic in the case of Exeggutor.