"He's not my friend, he's my brother!" Papyrus protests, accepting the stick. Really, can't this reptile see the resemblance? They're both skeletons. That should be enough... even if basically nothing about their faces or even body shapes looks the same right now.

That sounds a bit cold, as he hears himself say it, so he sheepishly adds, "maybe... he's both. Right. Anyway! Sans, take this! I'll pull you out." Extending the stick out, he carefully tries to keep his balance in the lakeside mud.