Pokemon-like Type Interaction via Blueprints?

Development Programming & Scripting Blueprint
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2

Hello and welcome! Well, as far as my Pokémon knowledge goes, I suppose you need this to calculate super-effectiveness, right?

There are many approaches to this problem, and yours is as valid as any. You can also do what Game Freak does and use a hard-coded solution or even a DataAsset/DataTable solution.

In older Pokémon games, Game Freak manually checks the attack type against the target type(s). In a modern code, it would be something like this:

// Hard-coded example.
switch (Attack.Type)
{
case EType::Fire:
	if (Target.Type.Contains(EType::Bug))
		Damage *= 2
	if (Target.Type.Contains(EType::Grass))
		Damage *= 2
	if (Target.Type.Contains(EType::Water))
		Damage /= 2
	if (Target.Type.Contains(EType::Fire))
		Damage /= 2
	if (etc.)
		...
	break

case EType::Water
	...
}

PS.: Notice that the Pokémon type property is an array of Types Enum.

As you mentioned, you can also apply an edit-friendly solution, like a data table or data asset, where you list the super effective and resistance types multipliers.

Types Enumerator
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Data Struct
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Data Table
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And of course, there are other approaches; it all depends on your project design; these are just the most straightforward methods.:

Also, Ryan Laley is doing a Pokémon like game series. Maybe it can help you.
Remaking Pokémon in Unreal Engine 5 LIVE - YouTube

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