What are all the ways to extend effects?

Question

ways to extend weather effects, terrain effects, tailwind, trick room, partial trapping moves, heal block things like that
so like your terrain extender, damp rock, grip claw, abilities that do the same thing etc

Comments

I know weather stones and terrain seeds boost the duration of how long the weather/ terrain lasts

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you mean terrain extender? terrain seeds boost your stats in that terrain

Answer 1

You already listed most of the items in your question but I’ll go ahead and list all of them.

Damp rock (increases rains duration by 3 turns)
Smooth rock (increases sandstorms duration by 3 turns)
Heat rock (increases sun duration by 3 turns)
icy rock (increases hail/snow duration by 3 turns)
Terrain extender (increases terrains duration by 3 turns)
light clay (increases screens and aurora veil duration by 3 turns)
Grip claw (makes binding moves always last 7 turns)

Source: experience

Comments

i really expected there to be more lol anyways thanks

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This is corroborated by https://bulbapedia.bulbagarden.net/wiki/Category:Duration-extending_items