Dodongo

Dodongos are large, reptilian enemies that are usually found in caves, volcanic, and mountainous environments, in many, sporadic titles. In, these ancient creatures mainly inhabit the eponymous Dodongo's Cavern. The infestation (along with the large boulder blocking the entrance) that is caused by Ganondorf prevents access to the cavern, which is the Gorons' main source of Bomb Flowers and food. Dodongos are well known for their consistent vulnerability to Bombs.

Characteristics
The Dodongo has drastically changed in terms of appearance and little in behavior over subsequent titles, going from a Triceratops/rhinoceros-like look in The Legend of Zelda to that of a bipedal lizard in the and  era to more of a gecko-like visual in Twilight Princess, although King Dodongo of Ocarina of Time is still referred to as the "Infernal Dinosaur", despite its lizard-like appearance. Physically, these creatures have very tough hides, ribbed with green scales that serve two purposes: as an armor of protection from any type of attack, and as hard covers that insulate the animal from the harsh, volcanic climate in which it usually resides at. In that same vein, Dodongo also have very large mouths in proportion to their body. These grand cavities, while vital for scavenging and eating, also function as the species' primary vulnerable site, as the rest of their body is covered in thick, impregnable scales. Another vulnerable site that the Dodongo has, is the tip of its tail. The Dodongo's tail unlike most of their body isn't covered by thick impregnable scales making it a major vulnerable point. However, Dodongos can also harm Link with their tails by sweeping them around in a full turn. If the sweeping tail manages to make contact with Link, it will knock the hero off his feet damaging him. These scales, however, can prove useful around Hyrule, for example, Gorons use them to make their heat-resistant Goron tunics, one of which Link can purchase in Ocarina of Time. Strangely enough, however, in, the Dodongos' smaller relatives, called Kodongos, don't have these armor-like scales, but are immune to bombs and smoke.

However, in titles such as Majora's Mask and, but not exclusively, the tail of the Dodongo functions as a secondary weak spot - Link must strike the tail with his sword in order to vanquish the being, causing the foe to explode in Ocarina of Time and Majora's Mask, respectively. Titles such as, , and focus on the mouth as the only site of attack, in comparison, while The Legend of Zelda incorporates a Dodongo with a weak underbelly. After using the Bomb as the primary weapon against these foes, often a single stab at the injured Dodongo body would be sufficient enough to defeat it.

While these enemies are often hard to defeat, they are quite slow moving creatures, easily avoided or confounded into showing their weak backside or revealing their mouth. Dodongos have been known to leap small distances and breathe fire as well, pausing for a beat with their mouths open wide before unleashing a bellow of flames.

As a Boss
Dodongos seem to make quite the popular Boss, appearing in several titles to date as such, the most prevalent being Ocarina of Time, where the massive King Dodongo makes an appearance at the end of the Dodongo's Cavern. A Dodongo makes a boss appearance in The Legend of Zelda as well, and as such in Four Swords Adventures, in the Oracle titles and in BS The Legend of Zelda, where they all fall victim to the popular strategy used to defeat them in most other games: through use of the Bomb. Unlike Dodongos of Ocarina of Time and Majora's Mask, more than one Bomb must be used to vanquish these foes, and rightly so, as they are not only bigger, but stronger than their commonplace counterparts. Exclusively in Oracle of Seasons, Link must equip the Power Bracelets to hoist the boss into a spiked floor after assaulting it with a Bomb. Like in all Zelda games, the Dodongo boss, and all bosses in general, will drop a plot-specific item upon defeat that must be obtained to continue the game's story.

Baby Dodongo
The Baby Dodongo is a fairly harmless but annoying foe which can be easily defeated with the sword. They are found in Dodongo's Cavern in Ocarina of Time. These enemies will burrow up from underground, moving quickly and directly attacking Link in small groups whenever he is in close proximity. They can also jump up above Link and attempt to ram him, which can be blocked with the Hylian Shield. Once defeated, it will explode. The resulting explosion is capable of harming Link but can be used strategically against soft or rock walls in the place of Bombs.

Dimitri
Not all Dodongos, however, are hostile creatures. In Oracle of Ages and Oracle of Seasons, there is a benevolent Dodongo in Spool Swamp by the name of Dimitri, who co-operates with and helps Link in Holodrum and Labrynna. Dimitri is a River Dodongo, and like his name implies, he can swims across deep water and up waterfalls to help Link gain access to previously outlying areas. Due to the type of Dodongo Dimitri is, he doesn't breath fire like his wild counterpart but he still has the large mouth, great for eating Link's foes. In order to reach him, the Strange Flute (which will later be identified as Dimitri's Flute) is needed, especially to summon him at will in both games. In Oracle of Ages, Dimitri is first found on Crescent Island after obtaining the third Essence of Nature from the Moonlit Grotto, being pestered by some Tokay, mistaking him for a "Red Fish". They ask Link if they can have his Ember Seeds to eat in return for the fish, and flee after suffering from heartburn. Afterwards, Dimitri thanks Link and helps by returning him to mainland Labyrnna.

In Oracle of Seasons, Dimitri is first found being attacked by the Great Moblin's henchmen after the second dungeon. If Link pays them a total of 80 Rupees, they will leave him alone. Dimitri will then thank Link and join him, turning the Strange Flute into Dimitri's Flute. He also has a second encounter, in which he is being pestered by children whilst Link is searching for the Zora's Flippers, but can only be seen if Link has Ricky's or Moosh's Flute instead.

Size Variation
In Majora's Mask, not only are Dodongos larger and stronger than their Ocarina of Time counterparts, there are two types of Dodongos in the area: there are smaller versions of Dodongos in the North-East area of Termina Field that grow to larger sizes as they migrate to the North-West section of the field. In said title, the Dodongos strangely reward Link with large quantities of cash upon defeat: the Big Dodongo yields a Purple Rupee when destroyed, and as for a regular Dodongo, 20 Rupees is the prize. Also in Majora's Mask, in Termina Field near the entrance to Ikana Canyon, there lies a grotto that contains two big Dodongos. After they are defeated, Link obtains 100 Rupees (dropped by the foes) and a Piece of Heart from a chest nearby.

Weaknesses
Across the series, the primary weakness exploited in this species is in the use of explosives. Link has two options: he can throw Bombs into their mouths, and can even leave the Bomb near the creature, exploding to deal external damage, and sometimes to stun. In the case of external explosion, this method often stuns the Dodongo, leaving it up to Link to go in with his trusty sword to finish off the foe. However, the most successful way to annihilate these enemies lies in the internal digestion of such Bombs, where damage infliction is certain. In Twilight Princess, shooting an arrow directly aimed into the throat of a Dodongo will cause them internal damage, like putting a bomb in their mouth, thus killing them instantly. Interestingly, the tails of the Dodongos seen in Majora's Mask and Twilight Princess are vulnerable to attack as well.

Animated series
A Dodongo also makes an appearance in "The Moblins Are Revolting" episode of the animated series. After Link and Princess Zelda arrive to an almost-deserted Underworld, a Dodongo comes charging in their direction. Link pushes Zelda out of the way and shoots various sword beams at the beast, but to no avail. Just as the Dodongo is approaching Link once again, Zelda throws a bomb at its mouth, which instantly defeats it.

The Legend of Zelda comic
In the Legend of Zelda comic, Princess Zelda encounters a Dodongo while she is in training in the Eagle labyrinth. When Miff appears to look out for Zelda, she warns the princess about the Dodongo behind her, allowing Zelda to defeat it with her last bomb.

Trivia

 * In The Legend of Zelda, Link can also beat the Dodongo with only one bomb. This comes in especially handy when Link is short on bombs, battling multiple Dodongos later in the game or both. It takes a bit of precision, but Link can lay a single bomb near the foe, as close to its path as possible without causing it to swallow the explosive. If placed correctly, the bomb will stun the creature, freezing it in place. Sometimes Link can even stun multiple Dodongos with one bomb.
 * Dodongos were not known to breath fire until after the appearance of the smaller fire-breathing Kodongos in A Link to the Past.
 * The Dodongo variants of Majora's Mask are the foes used to measure the strength of the many weapons in Majora's Mask, due primarily to their unparalleled vitality. This species is also affected by every single weapon in the game, save for the Deku Spin Attack, making them perfect for comparing weapon strengths.
 * The Dodongos in Twilight Princess are the only Dodongos that can walk on ceilings.
 * In Zelda: The Wand of Gamelon, Link comments "Boy, I can't wait to bomb some Dodongos!". This has caused a meme among Zelda fans.
 * Dongorongo appears to be a large variation of a Dodongo. Standard Dodongos have not been seen since the Great Flood.
 * The name Dodongo could be derived from the Japanese onomatopoeia for an explosion, "dodon". This could serve as tip for Japanese players to reveal their weakness to explosions.