[It's hard to focus on anything but cats when YOUR ROOM IS FULL OF THEM. Even with the door open, there are still a bunch hanging around, and Chara has spent much more time chasing their own yarnballs and untangling kittens and fussing and teasing until they get scratched because they're Chara, what else would they even do.]
[They did offer one more effort, though. They filled a bunch of extremely fragile-looking vases with canned tuna, then stuck them up on the highest shelf they could. If number 4 is sticking around, may as well make sure the little guy continues his pranking duties.]
4/15, later, with a sealed baggie filled with broken vase pieces (not sharp ones)
[Sans had to actually look up what that word even was and then had to look up how it was pronounced (more of this French thing he guesses?) and holy shit. He has to pat himself on the back for punning so well that even he didn't know it was a pun. Good job, Sans.]
[Meanwhile 4 shatters every single one of those vases, because 4 is an ornery cat, and is also a cat.]
[Sans does a bit more research and then unleashes the follow-up prank.]
[Also he chucked several fistfuls of catnip through Chara's window.]
[Another day where Nothing Gets Done, because a catnip grenade has gone off, and all these cats are high as kites. Chara has never been drooled on so much in all their days.
Unfortunately, Wonderland has a habit of being... Wonderland. Before they can come up with a prank in return, Shit Gets Real.]
[It's not a Stay Alive, Sans, because Chara. But that last note was cute. 4 is cute. So it's. Uh. It's something.]
[No prank is a boon, honestly. They had spent days in the diner, surrounded by humans (and monsters they were not happy with but also had to Consciously Decide to not kill), with little to do and less to eat. Trying to coast along on little five-minute snatches of resting their eyes because they did not trust a single person in there enough to actually sleep.
They, frankly, really really needed almost a full week to sleep it off, restore their fried nerves, and just. Not be around people. Except Frisk, I guess. Because they live there too.]
[And that much probably shows in their response. No prank either, and they're right back to being sharp.]
[Sans has seen monster dust enough times that he's not fooled, but it's still mildly unsettling to see. He just sort of sighs, nudges it aside with his slipper and succeeds in getting flour all over his slippers. Well it's not the first time he's walked through powdery substances hahaha...]
[But whatever. Wonderland will clean it up on its own.]
[There's no answer. Seems the prank war is truly over.]
4/15, Sweetly Naive of the Impending Zombie Apocalypse
[They did offer one more effort, though. They filled a bunch of extremely fragile-looking vases with canned tuna, then stuck them up on the highest shelf they could. If number 4 is sticking around, may as well make sure the little guy continues his pranking duties.]
4/15, later, with a sealed baggie filled with broken vase pieces (not sharp ones)
[Meanwhile 4 shatters every single one of those vases, because 4 is an ornery cat, and is also a cat.]
[Sans does a bit more research and then unleashes the follow-up prank.]
[Also he chucked several fistfuls of catnip through Chara's window.]
4/16, hastily taped up as they pass
Unfortunately, Wonderland has a habit of being... Wonderland. Before they can come up with a prank in return, Shit Gets Real.]
[It's not a Stay Alive, Sans, because Chara. But that last note was cute. 4 is cute. So it's. Uh. It's something.]
4/24, late, stuck to the door knob
[No prank yet since he forgot and also he's not sure if that's continuing.]
4/25, late morning, they literally nailed this to the door
They, frankly, really really needed almost a full week to sleep it off, restore their fried nerves, and just. Not be around people. Except Frisk, I guess. Because they live there too.]
[And that much probably shows in their response. No prank either, and they're right back to being sharp.]
4/25, night
[Oh yeah real friendly. They're great friends. BFFs. Man, that's hilarious.]
4/26, bright and early
[Don't look now but I think somebody's salty]
4/26, night
[He will literally bet money that Chara is going to "de-face" this note the moment they see it.]
4/26, almost immediately
4/26, shortly thereafter
[There's no answering post-it note, but there is a small pile of ashes left in front of their door.]
4/26, RIP prank war
There's a small pile of dust left in front of his door. May as well return the favour.
It's just flour. They never thought to keep Undyne's dust during That Fun and Wonderful Emotion Event. But how could they resist?]
4/26 a flight of angels sing thee to thy rest
[But whatever. Wonderland will clean it up on its own.]
[There's no answer. Seems the prank war is truly over.]