Of all 15 Egg Groups in the mainline Pokemon video game series, the Monster Egg Group is one of the most interesting. Members of the Monster Egg Group usually have designs inspired by dinosaurs or kaiju, with newer forms further highlighting their monstrous qualities.

RELATED:Video Game Creatures Based On Movie Monsters

There are over 80 Pokemon that are members of the Monster Egg Group, making it one of the biggest Egg Groups in the series. Because of the size of the Egg Group, not all members deserve their membership as much as others, and only a limited number of Pokemon fit in the Egg Group the best.

10 Tropius

tropius art and go model

Tropius, a Grass and Flying-type Pokemon from Gen 3, is the first Pokemon to be known as the Fruit Pokemon and has unspecified banana-shaped fruit growing on its neck as a result of eating its favorite fruit so much.

Tropius is an intriguing Pokemon in that it is based on giant long-necked dinosaurs, but thanks to the leaves on its back, it's able to fly despite its size. Although Tropius is not considered a prehistoric Pokemon, official TCG art has shown it living alongside Pokemon that are, implying that Tropius is one of the few living Pokemon species that have existed since prehistoric times.

9 Torterra

torterra art and cg

Torterra, the Continent Pokemon is a Grass and Ground-type 'mon, the only one with this type combination. Despite being known as the Continent Pokemon, Torterra are just over seven feet tall on average, although some small Pokemon still use the top of their shells for nesting purposes.

Although Torterra didn't receive a Gigantamax form, genetically enhanced versions appeared in the Detective Pikachu film alongside normal ones and were around the size of a hypothetical Gigantamax version, if not bigger. According to several Pokedex entries, people once believed a giant Torterra lived underground, so that's a clever connection.

8 Aggron

aggron and mega aggron

Aggron is a dual Steel and Rock-type Pokemon introduced in Gen 3. Known as the Iron Armor Pokemon, Aggron take entire mountains as their territory, attentively patrolling it, attacking anything that threatens it, and even restoring it after any kind of disaster messes it up.

RELATED: Pokemon: The Most Powerful Mega Evolutions Of All Time, Ranked

Mega Aggron, the Mega Evolved form of Aggron, is even stronger than Aggron's regular form and is capable of destroying steel tanks, although seemingly not much else is known about it. Mega Aggron also loses Aggron's Rock typing, becoming a pure Steel-type, if only temporarily.

7 Garchomp

garchomp and mega garchomp

Garchomp is one of the most notable Pokemon introduced in Gen 4, and there are plenty of reasons why. It's known as the Mach Pokemon because it is as fast as a fighter jet when flying. It's also the ace 'mon of Sinnoh League champion Cynthia.

Staring in Gen 6, Garchomp could Mega Evolve into Mega Garchomp, an even more powerful and rage-filled creature whose wings and arms have melted into scythes purely from how much energy it exudes. If there's any way to make a shark-dragon hybrid more terrifying, it's making it angrier and sharper.

6 Slowbro

slowbro original art and forms

Slowbro is a Water and Psychic-type Pokemon introduced in Gen 1. Known as the Hermit Crab Pokemon despite its more mammalian appearance, Slowbro also has a Mega Evolved form and a Galarian variant and is currently the only 'mon to have both.

While Mega Slowbro does not receive a type change, Galarian Slowbro swaps out its Water typing to become partially Poison-type and is one of only two Pokemon with that type combination alongside Galarian Slowking.

5 Charizard

charizard original art and gigantamax

Charizard is a famous Pokemon that has been popular since Gen 1 and was even the mascot Pokemon of the original Pokemon Red version and the FireRed remake.

RELATED:Pokémon: Ranking The Charmander Line & Every Form Of Charizard

Charizard's popularity has stood the test of time too, as it has been owned by four separate League champions, has two Mega forms and a Gigantamax form, and is even a playable character in Super Smash Bros Ultimate.

4 Snorlax

snorlax original and modern art

Snorlax is a classic and beloved Normal-type Pokemon infamous for blocking paths throughout the Kanto region. Reasonably known as the Sleeping Pokemon, Snorlax is a relatively docile beast that primarily spends its time eating or sleeping, but is impressively powerful when the situation calls for it

Although Snorlax does not have a Mega Evolution or any regional variants, in the Gen 8 games, Snorlax gained a Gigantamax form that's as big as a mountain and allegedly moves just as much as one. It's nice to know that despite its appearance changing, Snorlax's behavior doesn't.

3 Tyranitar

tyranitar and mega tyranitar

Tyranitar is a Dark and Rock-type Pokemon introduced in Gen 2. Known as the Armor Pokemon, Tyranitar is durable, prefers to live in mountains, and eagerly awaits strong opponents to fight - someone should set up a bout between it and Aggron. Tyranitar and its previous stages are the only Johtonian Pokemon exclusive to the Monster Egg Group.

Tyranitar can Mega Evolve into Mega Tyranitar, becoming more ferocious and destructive and even less likely to listen to its trainer. Tyranitar also has a rivalry with Duraludon, which may be a reference to kaiju films featuring Godzilla and Mecha Godzilla since both Pokemon seem to be inspired by the respective characters.

2 Nidoking

nidoking original and current art

Nidoking, a Poison and Ground-type known as the Drill Pokemon, shares its title with several others. It's also the male counterpart to Nidoqueen, who, interestingly enough, is not in the Monster Egg Group and cannot breed with it.

Nidoking is known for its thick hide, powerful tail, and horn capable of breaking diamonds. Even though it has been around a while as one of the original 151 Pokemon, there isn't much else known about it, but it seems to be a popular 'mon to have for several rival trainers in the anime series.

1 Rhydon

rhydon original sprite and artwork

Rhydon is a Rock and Ground-type Pokemon that can evolve further into Rhyperior and is similar to Nidoking in that it is also known as a Drill Pokemon and has a horn that is also capable of breaking diamonds. Rhydon's hide is dense enough that it can live in volcanic regions and be unaffected by lava up to 3,600 degrees.

As it turns out, Rhydon was also the first Pokemon ever designed, although its original appearance looks a bit different from what it looks like now, so with that significance, it's no surprise it appears somewhere in every mainline game.

NEXT: Times Time Travel Was Used In The Pokemon Franchise