Welcome to a new Pet Mod that explores a mechanic born through a meme on the web. With the introduction of the fossil fusion that was made by Pokémon Sword and Shield, some artists began to create art about past generation fossils going through the same process.
Since we can actually give sense to those ideas and test them in a simulator, we can organize to make the parts together, specifying the moves that each of them gives to the fusion. The mechanic that determines stats, typing abilities and movepool aims to respect the same pattern of the specifics of Arctovist, Arctozolt, Dracovish and Dracozolt. If you look at their movesets and typing, you can notice easily that they are a composition of 6 moves by one of the parts and 6 moves by the other, plus Ancient Power.
Name: Arctovish
Type:
Abilities: Water Absorb / Ice Body | Slush Rush
Stats: 90 / 90 / 100 / 80 / 90 / 55 | BST 505
Name: Arctozolt
Type:
Abilities: Volt Absorb / Static | Slush Rush
Stats: 90 / 100 / 90 / 90 / 80 / 55 | BST 505
Name: Dracovish
Type:
Abilities: Water Absorb / Strong Jaw | Sand Rush
Stats: 90 / 90 / 100 / 70 / 80 / 75 | BST 505
Name: Dracozolt
Type:
Abilities: Volt Absorb / Hustle | Sand Rush
Stats: 90 / 100 / 90 / 80 / 70 / 75 | BST 505
Credits to Serebii.net
So I kinda invented a mechanic that can determine those fusions among other fossil we alredy knew before 8gen.
The rules are:
The only thing is that there is no way to determine their moveset objectively, so we'll have to invent those ourselves!
So I've made some considerations:
As soon as possible I will make sprites that represent each part, but you can figure out looking at these:
Since each part gives 6 different level-up moves to each of the fusions it can make, we'll chose those 6 moves for each part among the list of the moves that the corresponding Pokémon can learn by level-up, breeding, previous evolutions and move tutor.
Head moves are the moves that the original fossil Pokémon executes with the upper part of its body, namely its head or arms, while tail moves are the ones performed using slam and legs. There are many moves which don't belog to any of those two categories, and those moves will be eligible to be assigned either as head or tail moves. For example, "Punch" moves, "Claw" moves or Zen Headbutt cannot be inherited as tail moves since the new specie needs the claws, the arms or the head of the original fossil Pokémon to perform that move, while Body Slam and "Tail" moves are not suited to be head moves, since the power needed for the slam isn't taken neither from head nor from arms (except if head is quadrupedal), and you can't use Iron Tail or Dragon Tail with your hands; there are some more considerations to be made, like that Aurorus needs the luminescent crests on its head and neck to perform Aurora Beam, but it can use the gems on its body or the ones on its head to charge energy for a Thunderbolt. But moves like Dragon Dance, Thunder or Recover don't imply which part of the body is needed to execute the move, and we can assume the new specie will figure out on its own how to use TM/HM moves based on the memories of its fusees, but since TM weren't all the same as they are in 8gen and TR didn't exist in gen7, we'll decide which moves can be learnt by each of the parts, among these lists.
TM List: https://bulbapedia.bulbagarden.net/wiki/TM
TR List: https://bulbapedia.bulbagarden.net/wiki/TR
What seems compulsory for a part generally is that:
Ok, now that the rules are set, we'll start making submissions. As I've said, you are able to submit the list of TM and TR transmitted by each of the original fossils, and 6 level-up moves for each of their head and tail parts, chosen among all the moves that they are able to learn in Ultra Sun / Moon.
List of moves that all parts learn by default (you don't need to consider them in your count as they fit as TM or TR or are already in all the parts movepools):
A website to see all the possible combinations:
Have fun making fusions!!

Name: Arctovish
Type:


Abilities: Water Absorb / Ice Body | Slush Rush
Stats: 90 / 90 / 100 / 80 / 90 / 55 | BST 505


Name: Arctozolt
Type:


Abilities: Volt Absorb / Static | Slush Rush
Stats: 90 / 100 / 90 / 90 / 80 / 55 | BST 505


Name: Dracovish
Type:


Abilities: Water Absorb / Strong Jaw | Sand Rush
Stats: 90 / 90 / 100 / 70 / 80 / 75 | BST 505


Name: Dracozolt
Type:


Abilities: Volt Absorb / Hustle | Sand Rush
Stats: 90 / 100 / 90 / 80 / 70 / 75 | BST 505

Credits to Serebii.net
So I kinda invented a mechanic that can determine those fusions among other fossil we alredy knew before 8gen.
The rules are:
- the new specie's name must be a composition of the names of the fusee;
- the new specie inherits both the secondary types of the fusees (Rock type if using Rampardos);
- the new specie inherits one ability from one of the fusees and two from the other one (regular abilities must be inherited as regular abilities, hidden as hidden);
- the new specie must have a BST equal to 505 and the single stats must not exceed 110 or be lower than 55;
- the new specie inherits 6 moves taken from one fusee's list of accessible moves in gen7 and 6 from the other one and Ancient Power and some other moves (which it gets by default, doesn't need to inherit those moves from parents, because they all learn them), 10 and 10 for TM/HM (excluding the TMs that every Pokemon can learn; no fossil is allowed in SW/SH, so we'll consider Gen7 for movepools, TM/HM and tutor moves list).
Primary Ability is the same as head's primary Ability, no matter what.
Hidden Ability is either tail's hidden Ability or, if that is the same as head's primary, tail's primary ability (this is to go around Armaldo, Omastar, Carracosta and Kabutops fusions, that would have two ability slots with the same ability).
If either primary or hidden ability is Defeatist, the fusion doesn't have a secondary ability, otherwise:
Hidden Ability is either tail's hidden Ability or, if that is the same as head's primary, tail's primary ability (this is to go around Armaldo, Omastar, Carracosta and Kabutops fusions, that would have two ability slots with the same ability).
If either primary or hidden ability is Defeatist, the fusion doesn't have a secondary ability, otherwise:
- if tail has a secondary ability that is different from primary and hidden ability, the fusion's secondary ability is the same as tail's secondary ability;
- if tail's primary ability is different from primary and hidden ability, the fusion's secondary ability is the same as tail's primary ability;
- if head has a secondary ability that is different from primary and hidden ability, the fusion's secondary ability is the same as head's secondary ability
Each fossil Pokemon has a type, up to 3 abilities and some stat bonuses (obtained by ordering the stats from lowest to highest and then multiplying 5 for the position).
For example Kabutops's stat spread is: 60 / 115 / 105 / 65 / 70 / 80, so 1 / 6 / 5 / 2 / 3 / 4, which x5 is 5 / 30 / 25 / 10 / 15 / 20.
Note: I will refer to upper body part as "head" and to the lower body part as "tail".
To make a fusion,
For example Kabutops's stat spread is: 60 / 115 / 105 / 65 / 70 / 80, so 1 / 6 / 5 / 2 / 3 / 4, which x5 is 5 / 30 / 25 / 10 / 15 / 20.
Note: I will refer to upper body part as "head" and to the lower body part as "tail".
Fossil Pokemon | Tail Name | Head Name | Type | Ability | HP | ATK | DEF | SPA | SPD | SPE |
![]() | Oma- | -star | ![]() | Swift Swim, Shell Armor, Weak Armor | 15 | 10 | 30 | 25 | 15 | 5 |
![]() | Kabu- | -tops | ![]() | Swift Swim, Battle Armor, Weak Armor | 5 | 30 | 25 | 10 | 15 | 20 |
![]() | Aero- | -dactyl | ![]() | Rock Head, Pressure, Unnerve | 20 | 25 | 5 | 10 | 15 | 30 |
![]() | Cra- | -dily | ![]() | Suction Cups, Storm Drain | 20 | 10 | 25 | 10 | 30 | 5 |
![]() | Arma- | -ldo | ![]() | Battle Armor, Swift Swim | 15 | 30 | 25 | 10 | 20 | 5 |
![]() | Rampa- | -rdos | ![]() | Mold Breaker, Sheer Force | 25 | 30 | 15 | 20 | 5 | 10 |
![]() | Bastio- | -don | ![]() | Sturdy, Soundproof | 20 | 15 | 30 | 10 | 25 | 5 |
![]() | Carra- | -costa | ![]() | Solid Rock, Sturdy, Swift Swim | 15 | 30 | 25 | 20 | 10 | 5 |
![]() | Arche- | -ops | ![]() | Defeatist | 15 | 30 | 5 | 25 | 5 | 20 |
![]() | Tyra- | -ntrum | ![]() | Strong Jaw, Rock Head | 20 | 30 | 25 | 10 | 5 | 15 |
![]() | Auro- | -rus | ![]() | Refrigerate, Snow Warning | 30 | 15 | 10 | 25 | 20 | 5 |
- decide which Pokémon will give the upper body and which the lower;
- determine the name, tail gives the first part, head gives the last;
- determine the typing, which will simply be a combination of the single types given by each of the fusees (head first, tail second);
- determine the ability, head will give its primary and secondary ability, tail will give its hidden ability (Defeatist is used as Archeops's Hidden Ability as well);
- determine the moveset by giving the fusion the 6 head moves of the head, 6 tail moves of the tail and both all the 10 TM/HM moves of the head and all the 10 TM/HM moves of the tail - the new specie will also get Ancient Power, Earth Power, Rock Polish, Rock Slide, Rock Tomb, Sandstorm, Stealth Rocks, Stone Edge and basic TM moves (like Protect, Toxic, etc.), so you don't need to include them as inherited;
- to determine each stat, follow this formula: 50 + HeadStatBonus + TailStatBonus - if BST is 510 (so none of the fusee is Omastar, Cradily or Archeops), highest stat will lose 5 points (if more stats are equally lower than the others, points are subtracted from the first following the order HP->ATK->DEF->SPA->SPD->SPE).
- If head's Attack stat is higher than tail's, given the stat spread obtained by the two fossils, Attack is swapped with Defense and Special Attack is swapped with Special Defense.
Name: Armarus
Head Pokemon: Aurorus
Tail Pokemon: Armaldo
Typing:
Ability: Refrigerate | Swift Swim
Stats:
Head Moves: (for example) Freeze-Dry, Icy Wind, Aurora Beam, Earth Power, Discharge, Hyper Voice
Tail Moves: (for example) Stealth Rock, Aqua Jet, Aqua Tail, Rapid Spin, Harden, Superpower
TM/HM from head: (for example) Hail, Ice Beam, Blizzard, Calm Mind, Thunderbolt, Thunder, Reflect, Light Screen, Flash Cannon, Thunder Wave
TM/HM from tail: (for example) X-Scissor, Rock Slide, Stone Edge, Rock Polish, Rock Tomb, Earthquake, Swords Dance, Sandstorm, Brick Break, Aerial Ace
Head Pokemon: Aurorus
Tail Pokemon: Armaldo
Typing:


Ability: Refrigerate | Swift Swim
Stats:
HP | 50+30+15 | 95 |
ATK | 50+15+30 | 95 |
DEF | 50+20+15 | 85 |
SPA | 50+15+20 | 85 |
SPD | 50+10+10 | 70 |
SPE | 50+5+5-5 | 55 |
BST | 50*6+(1+2+3+4+5+6)*5+(1+2+3+4+5+6)*5-5 | 505 |
Tail Moves: (for example) Stealth Rock, Aqua Jet, Aqua Tail, Rapid Spin, Harden, Superpower
TM/HM from head: (for example) Hail, Ice Beam, Blizzard, Calm Mind, Thunderbolt, Thunder, Reflect, Light Screen, Flash Cannon, Thunder Wave
TM/HM from tail: (for example) X-Scissor, Rock Slide, Stone Edge, Rock Polish, Rock Tomb, Earthquake, Swords Dance, Sandstorm, Brick Break, Aerial Ace
The only thing is that there is no way to determine their moveset objectively, so we'll have to invent those ourselves!
So I've made some considerations:
As soon as possible I will make sprites that represent each part, but you can figure out looking at these:
https://www.spriters-resource.com/ds_dsi/pokemonblackwhite/
in the "Parts" section.
in the "Parts" section.
Head moves are the moves that the original fossil Pokémon executes with the upper part of its body, namely its head or arms, while tail moves are the ones performed using slam and legs. There are many moves which don't belog to any of those two categories, and those moves will be eligible to be assigned either as head or tail moves. For example, "Punch" moves, "Claw" moves or Zen Headbutt cannot be inherited as tail moves since the new specie needs the claws, the arms or the head of the original fossil Pokémon to perform that move, while Body Slam and "Tail" moves are not suited to be head moves, since the power needed for the slam isn't taken neither from head nor from arms (except if head is quadrupedal), and you can't use Iron Tail or Dragon Tail with your hands; there are some more considerations to be made, like that Aurorus needs the luminescent crests on its head and neck to perform Aurora Beam, but it can use the gems on its body or the ones on its head to charge energy for a Thunderbolt. But moves like Dragon Dance, Thunder or Recover don't imply which part of the body is needed to execute the move, and we can assume the new specie will figure out on its own how to use TM/HM moves based on the memories of its fusees, but since TM weren't all the same as they are in 8gen and TR didn't exist in gen7, we'll decide which moves can be learnt by each of the parts, among these lists.
TM List: https://bulbapedia.bulbagarden.net/wiki/TM
TR List: https://bulbapedia.bulbagarden.net/wiki/TR
What seems compulsory for a part generally is that:
- If the Pokémon has 4 arm, 2 become part of the head part and the other two plus, eventually, the tail, will be included in the tail part.
- Cradily's head part is made only on its neck and head, whereas the tail part is made by the four appendages it has on its body, so no tail part should pass moves that imply the use of arms.
- the tail part of Omastar and Carracosta is constituted by their shell and tentacles or feet, so only the tail part will be able to pass Shell Smash.
- same goes for Rampardos and Tyrantrum, whose moves like Dragon Tail and Dragon Dance will be passable only by the tail part, while Dragon Claw, Head Smash and Dragon Pulse only by the head part (EDIT: nearly all the Dragon-type moves I've said are TRs now lol).
Ok, now that the rules are set, we'll start making submissions. As I've said, you are able to submit the list of TM and TR transmitted by each of the original fossils, and 6 level-up moves for each of their head and tail parts, chosen among all the moves that they are able to learn in Ultra Sun / Moon.
List of moves that all parts learn by default (you don't need to consider them in your count as they fit as TM or TR or are already in all the parts movepools):
Ancient Power
Earth Power
Rock Polish
Rock Slide
Rock Tomb
Sandstorm
Stealth Rock
Stone Edge
Earth Power
Rock Polish
Rock Slide
Rock Tomb
Sandstorm
Stealth Rock
Stone Edge
Attract
Facade
Protect
Rest
Round
Snore
Facade
Protect
Rest
Round
Snore
Have fun making fusions!!
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