90% would go the exact same as base undertale
oh? i never fought him only seen fights, but if that’s true then that’s neat.
even so don’t they fade when SS dies? in which case it probably doesn’t matter too much
also, quick argument for Muffet: what’s Calvus gonna do if he gets jumped by 1000 spiders before he can pull off a 500! 500! 500!
Calvus prob loses to Undertale 2: revenge of the robots sadly 
have you considered SwitchSwapSwapSwapFellSwap Purple Sans?
apocalypse bringer aoe
Undertale quagmire swap 
let me name a few
Ink tale, Error Tale, story shift, devilovania, ultra tale, the x!event, underverse, glitch tale
ink tale he stands no chance against the gardians who can just summon all AU’s
Error he just gets deleted
Storyshift he has a chance but he is pretty much fighting a savant who is much like him.
devilovania is a harder version which she is also with extra stuff
X!Event he gets overwrited
Same in underverse but worse
glitch tale he just has to suffer betty mostly which he can’t take if it took a steroid chara and hyperdeath
any character in glitchtale will beat calvus because the writer will just give them a new power to get them out of any situation theyre in
Yeah calvus is cooked in the overpowered oc aus
The only threatening thing about error’s kit is his strings, everything else is just base sans nonsense
Plot armor strikes again
actually i take that back, alphys wouldn’t live because the writer has an undying hate for her and wants her dead as soon as possible (she was killed off almost immediately for shock value)
okay but Undyne’s Determination form was actually kinda sick to see when i was a bit younger even if the animation isn’t spectacular
i said jumped he didn’t plan for this and Muffet’s getting serious since he probably wiped out the spiders in the Ruins
the only fair AU would be hard tale as it is just harder undertale, meaning the characters already doing well do better and some mini bosses to more
also calvus should not be able to heal cause thats time manip
they got my boy sans
Bruh it’s not like he’s ritual casting ab explosion
I want to do a Calvus VS people’s OCs fight so badly
but I’m the only one here with characters 
exactly it’s his strongest move and takes time to charge, so unless if he pulls off a bullshit binding vow like a certain main antagonist who likes eating fingies…
my ocs that ive never shared and never will lose to calvus
Source