In Pyco Mundi, all individual Pycotrophs are associated with one or more type of energy. This is known as their Type Affinity. Each type has associated weaknesses and resistances to other types of energy. This functions as a multiplier to the amount of damage taken in battle. The effectiveness of a move can be categorized as '''Extremely Effective''' if the multiplier is 3x or higher, '''Very Effective''' if it is 2x or higher, '''Ineffective''' if it is 0.5x or lower and '''Barely Effective''' if it is 0.2x or lower. Damaging moves that are considered Barely Effective will not be able to apply a harmful Status Condition or negatively change modifier stats of the target. When resistances or weaknesses stack together, diminishing returns cause each additional modifier to be halved. For example, a Land/Fire Pycotroph that is hit by a Water move will only take 3x damage. Similarly, a Rock/Electric Pycotroph that is hit by an Air move will take 0.375x damage.

Basic	Air	Fire	Land	Water	Primordial	Honed	Plant	Rock	Electric	Ice	Metal	Noxious	Psychic	Dark	Light	Spirit	Mythic	Cosmic
								1/2x				1/2x				1/5x		2x
Air						2x	2x	2x	1/2x	1/2x		1/2x					1/2x
Fire			1/2x		1/2x	2x		2x	1/2x			2x					1/2x
Land		1/2x	2x			1/2x			2x	2x			2x				1/2x
Water			2x	2x	1/2x			1/2x	2x							1/2x
Primordial							1/2x	2x			1/2x	1/2x	1/2x	2x	2x		1/2x
Honed	2x	1/2x				1/2x			2x		2x	2x	1/2x	1/2x	2x		1/5x
Plant		1/2x	1/2x	2x	2x	1/2x		1/2x	2x			1/2x	1/2x
Rock		2x	2x	1/2x		2x	1/2x			2x	1/2x
Electric		2x		1/5x	2x			1/2x		1/2x	2x	2x			1/2x
Ice			1/5x		2x	2x		2x	2x			2x		1/2x
Metal			1/2x		1/2x				2x	1/2x	2x	1/2x
Noxious				1/2x	2x			2x	1/2x			1/5x	1/2x			2x	1/2x	2x
Psychic							2x					2x	2x	1/2x	1/5x	1/5x
Dark						1/2x	1/2x							2x	1/2x	2x	2x	2x
Light					1/2x			1/2x	1/2x			1/5x	2x	2x	2x	1/2x	2x
Spirit	1/5x												2x	2x	1/2x	1/2x	2x
Mythic												1/2x				1/2x		2x	1/2x
Cosmic	2x																1/2x	1/5x