at the same time we know the anime has taken liberties before, and they could easily do the same here.
Electivire's ability does allow it to absorb electricity, but there's got to be a limit to how much it can truly absorb, if the 10V thunderbolt was capable of knocking Tapu Koko (a legendary) out, while also completely destroying a giant energy rock golem at the same time, it would not surprise me at all if electivire couldn't handle the sheer amount of power it's trying to absorb and gets either knocked out or risks getting so much power it could potentially explode like Pikachu almost did back at the start of hoenn causing the fight to be stopped for the pokemon's safety, on the other hand if Electivire is able to easily withstand the move, then that undercuts the usage of it and also makes Tapu Koko look weak.
hopefully though the writers will not go down that road and have Pikachu use the move on Rotom or Luxray and not electivire, because if they do, there's going to be huge controversial ramifications coming out of this match.
No, Electrivire withstanding 10Volt Thunderbolt doesn’t make Tapu Koko look weak.
Look while Z-Moves are strong they are still effected by things like abilities and typing. Electrivire absorbing 10Volt Thunderbolt through its ability doesn’t mean that Volkner’s Electivire was strong then Tapu Koko all it would mean is that Electivire had ability that could protect it and take advantage of the situation.
Your basically trying to create a controversy or a problem when none actually exist. If anything if Volkner switches Electivire in on Ash while Ash is using that Z-move that just shows cleaver or good Volkner is.
Tapu Koko is not immune to Electric type attacks and it had taken damage prior and was worn down so of course it was going to be taken down by 10V Thunderbolt.
In recent series the anime has gotten better of being consistent when it comes to a Pokémon that has a ability or type that makes it immune to certain types of moves.
Yes it’s true that when it came to immunities to specific types of the moves that the anime in early series would take liberties with that and sometimes still have the moves work but in more recent series they really cut down on doing stuff like that.
Trying to say that because Pikachu’s 10V Thunderbolt beat the Guardian of Alola that was being used by the legendary Pokémon Tapu Koko so that means Pikachu’s siganture Z-move has to automatically by past Volkner’s Electivire’s ability and knock it out and if it doesn’t it somehow means Tapu Koko is weak is a good example of a false equivalency.