The walls have eyes everywhere, watching your every move. You might not see them now, but they're here. And just when you think you're safe, you are being spied on.
If you solve Ms. Mowz's trouble, she will let you keep the badge you got for her (it's initially treated as an important item). However if your badge inventory is full, she will acknowledge this and jump offscreen towards the shop, then return and say she's left it at the shop for you to pick up later.
I wasn't either, until I used a randomizer hack that turns every badge, item, Star Piece, Shine Sprite or coin into a random entity that can be any badge, item, Star Piece, Shine Sprite (these seem pretty rare though, I'm now in chapter 5 and haven't gotten a single one) or even a Crystal Star (which is useless since everything tied to them is scripted in the story). Thus, enemies that drop many coins suddenly drop many other things that include badges, by chapter 4 I hit the badge limit and had to start tossing them (thankfully, there were many Double Pains and Slow Gos and the like I could toss)
Also some of the Crystal Stars you get at the end of the chapter (except Chapter 2 for some reason) is a random badge or item, though it still counts as clearing the chapter and you get the special move. It just looks weird seeing random stuff spinning around Mario.
KOing your own teammate in SSB4 for Wii U's Classic mode gives you a copy of that teammate. If you use both of the same characters as teammates, one of them will be wearing an alternate costume.
For example, if you have two default Marios as your teammates, one of them will be wearing their Wario costume
I just realized recently that Fox makes a different noise when he picks up items in Super Smash Bros. 64. He also has a roll dodge noise in Smash Bros. 64.
That stuff is neat, why can't later games make more use of unique noises like that?
Despite Isabelle being the only animal crossing character in MK8D who has a an in-game voice, she is one of few characters who have a digitally made voice, and thus doesn't have a voice actor.