>>716015278
The same could've said about Tenna, and yet he's there chilling in the castle (until you give him to Mettaton)

>>716015514
For me it's those things
>knows about Kris' adventure even though we never saw him anywhere else
>uses phrases like "big shot" and "chaos chaos" despite never meeting or acknowledged by Jevil and Spamton
>the Shadow Mantle quest and how the hell he even got the mantle
>a pippin gives us a lore dump while talking shit about him
Ramb and Tenna are the only darkners that actually know Kris personally AND knows that Kris created the fountain, so that's what separates him from other darkners.