#7, The girls attempts to find a secret base, just all of it.
#8, Miyuki being able to transform into Cure Candy.
A more subtle moment being at the beginning of the episode, the three Bad End Commanders arguing amongst each other about what happened to Majorina's "Switcheroo" rings. When it's revealed that Akaoni lost them by accident, the other two say that it's all his fault, with Akaoni happily admitting it.
Also from episode 8, pretty much the entire school day with Candy as Miyuki. It'd be easier just to call this an entire Episode of Funny.
Majorina objecting to being called 'obaa-chan' by the cop.
#10, the eyecatches usually have the Cure the episode is based on in the one before the commercials, and Candy in the one after. With the girls chibified and them and Candy cheering and shouting the names. In this episode it's a little different◊.
Wolfrun's entire trip to the Human World, because he's hungry. From him getting kicked out of a restaurant because they think he's wearing a mask, to his Wile E. Coyote-ish reaction to Cure Sunny knocking the Akanbe in the air.
#11, Miyuki being carried away by the ants.
As well as any time Nao freaks out over bugs.
The music when Nao is freaking out about the bugs.
Cure March kicking the Akanbe into Majorina's face.
After they defeat the Akanbe, Majorina throws a tantrum, causing the mini-sized Precures to be jostled around. Majorina pauses before stamping her feet again, apparently just to screw with them. It's even funnier because the Precures have super-squeaky voices from being shrunken.
#13, all of it. Especially the scramble to catch the falling tea boiler, which ends with Miyuki holding it over her head... and it's contents pouring out onto the teacher who walked in behind her.
#15, none of the girls can think of anything Miyuki is good at, possibly excepting reading and being a klutz.
#16, the girls' reaction to Reika bringing up Precure on the list of things she's quitting, complete with Miyuki grabbing Candy and hugging her fangirl-style.
#17, considering it's a manzai route. But Cure Gorilla takes the cake.
#27, Miyuki's grandma completely no-selling Wolfrun's Bad End. Something about the way the the music cuts in and out as the camera cuts between him and her serene smile just kills it. The followup, with Grandma calling Wolfrun a fox and then ignoring his threats to go inside and get some snacks, is also aces.
And the cut to the clock that isn't moving.
#29: After the Ferris wheel memory ride, Akane, Yayoi and Nao end up adopting and saying Miyuki's Catch Phrase complete with the trademark face of (-3-): "Ultra Happuppu..."
Later in the episode, Beauty—when Reika seemed completely unfamiliar with the concept of Humongous Mecha earlier in the episode—can pilot mech!Happy flawlessly when even Peace couldn't... because she read the book Yayoi handed her. Also worth noting with Peace's excuse of not being able to do so despite everyone eyeing at her: "Just because I fawn on them doesn't mean I can control them!"