/tg/ Station 13 - Modules - Types

code/modules/mob/living/basic/space_fauna/wumborian_fugu/inflation.dm

/datum/action/cooldown/fugu_expandAction which inflates you, making you larger and stronger for the duration. Also invulnerable. This is pretty much all just handled by a status effect. Unfortunately the requirements here are specific enough that it kind of only works for the mob it is designed for.
/datum/status_effect/inflatedStatus effect from the Expand action, makes you big and round and strong.