Hidden Details: Mario's Midlife Crisis

Welcome to the fiftieth 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".

The Patron who has found the most Hidden Details at the end of the year might win something nice... We still need to do the big reveal of 2019's winner, but it's happening very soon!

Please only comment with ONE hidden detail or reference!

There is NO JoJo reference, ONE Loss and ONE Balthazar.

1: Correct John Hattan. Well, semi-correct. The green toothbrush is Yoshi's. Luigi and Daisy sleep in a different room, of course.
2: Yes! Mario's toothpaste has Chain Chomp as a mascot. I thought that was fitting. Thanks for noticing, Zanreo.
3: I was hoping for people to notice it's Balthazar and Panda as the American Gothic couple, but yes, in the second panel, a portrait of the bunnies is visible. He's doing well, Lumilias!
4: I tried to make it look like merely a Poltergust-inspired vacuum, but Luigi vacuuming is definitely a reference to Luigi's Mansion, CrazySeanDX.
5: Luigi is indeed wearing Mario's moustache over his own moustache. Good eye, Screen Name.
6: Min-Min and Rosalina are using their range to hang up a banner, as orchestrated by Isabelle. Found by Alex Nelson.
7: The outlet in the second panel is a Japanese outlet! I had to Google those to accurately draw them
8: The postcard you get in Sunshine upon 100% completion is visible on the mirror. Good catch, Phloxiana.
9: Greninja does indeed turn into his substitute doll when hiding from Mario, Marwan Abunura!
10: And Fox does his side-B, Fox illusion, to quickly get away! Correct, Put 9-Volt In Smash Bros Please.
11: Hahaha yes Zach, Samus is still wearing the moustache and hat as a Morph Ball in the fourth panel. I thought this was particularly funny.
12: One of the Pikmin trips while trying to run away :(
13: Samus has a little Mario flag coming from her arm gun in the semi-final panel
14: All the flags have Mario colours!
15: Correct, Luke. There is indeed a loss-inspired bouquet of flowers visible in the final panel.

After one week, I'll reveal all the details that haven't been found. These ones are written in italic.