My Arceus V is active and I have Dunsparce with "Mysterious Nest" Ability on my bench. If my opponent uses Spritomb's "Ticking Terror" attack does Arceus V now have {D} weakness, or does "Mysterious Nest" keep it with no weakness?

The Ticking Terror attack would switch Arceus V's weakness to {D}, but then Dunsparce's Mysterious Nest would change Arceus V back to no weakness. However, since Ticking Terror says "Until the end of your next turn..." Arceus V would become weak to {D} if Dunsparce were to leave play or have its Mysterious Nest ability shut off.

Relevant cards

SWSH8_207

SWSH9_89