Various Items and Ether Spells can be crafted with the Combine System inside the Items tab.
Some items also turn into scrap items after being used.


Mana Potion Recipe:
Glass Bottle + Mana Powder = Mana Potion

Potion Recipe:
Glass Bottle + Potion Powder = Potion

Full Potion Recipe:
Hi-Potion + Dispel Herb = Full Potion

Hi Potion Recipe:
Potion + Dispel Herb = Hi-Potion

Elixir Recipe:
Potion + Mana Potion = Elixir
Hi Potion + Mana Potion = Elixir
Glass Bottle + Ether Essence = Elixir
Full Potion + Mana Potion = Elixir

Spaceship Fuel:
Ether Essence + Ancient Fossils = Spaceship Fuel

Bomb Recipe:
Fuse + Metal Casing = Bomb

Arrow Recipe:
Arrow Head + Scrap Wood = Arrow

Boomerang Recipe:
Scrap Wood + Rusted Iron Blade = Boomerang

Lock Pick Recipe:
Scrap Wood + Steel Rod = Lock Pick

Defence Turrent Recipe:
Droid Components + Metal Casing

Dispel Herb Recipe:
Mungon Herb + Old Root Planet = Dispel Herb

There is also a handful of other secret recipes which involve Main Handed/Secondary Weapons.

Spells can be combined with monster ingredients to alter and boost their effects.

Poison Ground Rush:
Ground Rush (Skill) + GRASS based monster ingredient
Nighfang Wing (GRASS)
Striped Stinger (GRASS)
Mushi Spore (GRASS)
Floori Spore (GRASS)
Cave Sucker Wing (GRASS)
Sticky Embryo (GRASS)
Scaver Tooth (GRASS)

Poison Flame Storm:
Flame Storm (Skill) + GRASS based monster ingredient
Nighfang Wing (GRASS)
Striped Stinger (GRASS)
Mushi Spore (GRASS)
Floori Spore (GRASS)
Cave Sucker Wing (GRASS)
Sticky Embryo (GRASS)
Scaver Tooth (GRASS)

Poison Water Burst:
Hydro Burst (Skill) + GRASS based monster ingredient
Nighfang Wing (GRASS)
Striped Stinger (GRASS)
Mushi Spore (GRASS)
Floori Spore (GRASS)
Cave Sucker Wing (GRASS)
Sticky Embryo (GRASS)
Scaver Tooth (GRASS)

Poison Thunder:
Thunder (Skill) + GRASS based monster ingredient
Nighfang Wing (GRASS)
Striped Stinger (GRASS)
Mushi Spore (GRASS)
Floori Spore (GRASS)
Cave Sucker Wing (GRASS)
Sticky Embryo (GRASS)
Scaver Tooth (GRASS)

Lightning Water Burst:
Hydro Burst (Skill) + MECHA based monster ingredient
Electronic Core (MECHA)


Lightning Flame Storm:
Flame Storm (Skill) + MECHA based monster ingredient
Electronic Core (MECHA)

Lightning Pound:
Ground Pound (Skill) + MECHA based monster ingredient
Electronic Core (MECHA)

Lightning Storm:
Thunder (Skill) + MECHA based monster ingredient
Electronic Core (MECHA)

Dark Water Burst:
Hydro Burst (Skill) + SPIRIT based monster ingredient
Undina Fabric (SPIRIT)
Ether Feather (SPIRIT)
Harpy Talon (SPIRIT)

Dark Firestorm:
Flame Storm (Skill) + SPIRIT based monster ingredient
Undina Fabric (SPIRIT)
Ether Feather (SPIRIT)
Harpy Talon (SPIRIT)


Dark Ground Rush:
Ground Rush (Skill) + SPIRIT based monster ingredient
Undina Fabric (SPIRIT)
Ether Feather (SPIRIT)
Harpy Talon (SPIRIT)


Dark Thunder:
Thunder (Skill) + SPIRIT based monster ingredient
Undina Fabric (SPIRIT)
Ether Feather (SPIRIT)
Harpy Talon (SPIRIT)


Scorched Water:
Hydro Burst (Skill) + FLAME based monster ingredient
Warm Embryo (FLAME)
Gorgannon Tooth (FLAME)
Gorgun Tooth (FLAME)


Molten Flames:
Flame Storm (Skill) + FLAME based monster ingredient
Warm Embryo (FLAME)
Gorgannon Tooth (FLAME)
Gorgun Tooth (FLAME)

Scorched Ground:
Ground Rush (Skill) + FLAME based monster ingredient
Warm Embryo (FLAME)
Gorgannon Tooth (FLAME)
Gorgun Tooth (FLAME)

Scorched Thunder:
Thunder (Skill) + FLAME based monster ingredient
Warm Embryo (FLAME)
Gorgannon Tooth (FLAME)
Gorgun Tooth (FLAME)

Wave Force:
Hydro Burst (Skill) + HYDRO based monster ingredient
Slimy Substance (HYDRO)
Cosmic Ooze (HYDRO)
Wet Embryo (HYDRO)
Nymph Water Jewel (HYDRO)

Hydro Flame Storm:
Flame Storm (Skill) + HYDRO based monster ingredient
Slimy Substance (HYDRO)
Cosmic Ooze (HYDRO)
Wet Embryo (HYDRO)
Nymph Water Jewel (HYDRO)

Hydro Spark:
Thunder (Skill) + HYDRO based monster ingredient
Slimy Substance (HYDRO)
Cosmic Ooze (HYDRO)
Wet Embryo (HYDRO)
Nymph Water Jewel (HYDRO)

Hydro Pound:
Ground Rush (Skill) + HYDRO based monster ingredient
Slimy Substance (HYDRO)
Cosmic Ooze (HYDRO)
Wet Embryo (HYDRO)
Nymph Water Jewel (HYDRO)

Ground Burst:
Hydro Burst (Skill) + GROUND based monster ingredient
Stone Golem Boulder (GROUND)
Chikantor Feather (GROUND)
Ripshred Paw (GROUND)
Boarus Fang (GROUND)

Ground Storm:
Flame Storm (Skill) + GROUND based monster ingredient
Stone Golem Boulder (GROUND)
Chikantor Feather (GROUND)
Ripshred Paw (GROUND)
Boarus Fang (GROUND)

Ground Clap:
Thunder (Skill) + GROUND based monster ingredient
Stone Golem Boulder (GROUND)
Chikantor Feather (GROUND)
Ripshred Paw (GROUND)
Boarus Fang (GROUND)

Quake:
Ground Rush (Skill) + GROUND based monster ingredient
Stone Golem Boulder (GROUND)
Chikantor Feather (GROUND)
Ripshred Paw (GROUND)
Boarus Fang (GROUND)