Hidden Details: A Friendly Awakening

Welcome to the one-hundredth-and-fortieth episode of the Hidden Details blog!

Have you found some obscure reference or detail in this comic? A JoJo reference? A sneaky little Loss? A callback to a previous comic? Let us know what you've found in the comments! Every detail that has been found will be added to the list below. Once everything has been found, this comic will officially be marked with "all details found".

Link to the comic for your convenience

Please only comment with ONE hidden detail or reference!

There is ONE Loss, ONE Balthazar, ONE crewmate and NO JoJo references. Bonus panels don't count.

1: Isabelle still has trouble remembering Sans isn't Sans but actually Mii Gunner, as she almost has a slip of the tongue in the first panel, as mentioned by Lord Circe.
2: This week's obscure retro game character portrait (I might make this a recurring thing): Monkey from the PS1 game Monkey Hero (1999). He has a portrait in the background of the second panel.
3: In the second panel, there's a little Baby Mac duty sheet hanging on the door, showing who is taking care of Baby Mac during the week. And yes Trigger, I made sure that this sheet matched Baby Mac and Donkey Kong (on Wednesday) later on in the comic! Wario Saturdays will probably be really interesting, A Sad Fat Dragon with No Friends. But maybe Wario has a fatherly side to him? And yes, Samus has Baby Mac duty for three days, Jerry Woods III. She's the main caretaker after all.
4: Not sure who is married to who in this universe, Jeffrey Solis. Whether or not they're married, I think they can be regarded as friends regardless, hence the inclusion of Lissa in this comic. But you did point out Frederick's card in the third panel.
5: In the third panel, one of the books on the shelf in the background is apparently one of Robin's tomes, since the cover says "Elthunder", as mentioned by Cameron Devera.
6: Yes, Balthazar actually has multiple appearances this week! He appears in the background of the fourth panel and then moves to the front to watch the spectacle between Sora's legs in the fifth panel. Glad you noticed him, Rob Molivas!
7: I'm glad Mink (ex-intern and now freelance comic helper) remembered the Ridley flower because I would have totally forgotten it. Good eye, Jon Brouse.
8: Corrin is wearing the slippers Isabelle gave him in the previous comic. Very nice of him to not decline Isabelle's present, Michael Ederer!
9: Yep, loss is in Donkey Kong's tie this week, but the four parts are divided among four panels. Good catch, Generic Hero!
10: Waluigi is considered a friend of the gang now, apparently. Probably because he helped revive the Mario characters, VisionPlayer22.
11: A Rabbid joins the group of friends in the fifth panel as well. I only added this guy because I'm playing Mario + Rabbids right now, so I got Rabbids on my mind, Lukas Wandler.
12: Yep, it's hard to spot, but Chrom's Mark of the Exalt on his arm changes into a dickbutt in the final three panels. Glad you were able to spot this, Bastion.
13: The crewmate isn't even particularly well hidden this week. It's just standing there between Marth and Kirby in the final two panels. It also cheers in the final panel, Zach.
14: Incineroar and Kazuya rudely block Isabelle 2's view, so she has to peek between Incineroar's legs in the final two panels. Good eyes, Daniel Myhre.
15: Not really, UnSaxon51, but I did think it would be funny to make Ridley just perform a beastly screech instead of actually cheering, so I'll count it!
16: Special shoutout to FoxdocDylan who noticed I mistakenly wrote Waluigi's Γ backward in this comic.

All the details that haven't been found are written in italic.