>>43412935Ooo, better, it comes in as a different Pokemon (like Zoroark) gets substitute health for that other Pokemon (1/4) alongside it's moves, it's resistances, it's stabs, and a reduced version of it's stats. And then after the sub health is gone the illusion fades and it's this wimpy little psychic bug with stupidly low stats. But switching out refreshes it's ability.
Maybe the final hit to the illusion has overflow into the Parasites own health to promote this thing not being switched in and out CONSTANTLY. Or maybe that 1/4 health from the illusion is actually taken from the Pokemon on the trainers team, IE: They send out the bug, it's a Tyranitar, it's typing/stats/moves/etc are all the same, but it's got 1/4 of the real Tyranitars health. And if that real Tyranitar is ever used, it'll be missing 1/4 of it's health. A quarter might even be too high, honestly.