Before the rematch, Joshua starts his shuffle with a fancy card spring flourish. Ava pauses for a second, then transfers her deck manually from one hand to the other while saying "pshoo".
Regionals
Ava's mom loudly whispers to her daughter that she packed her baby powder for her rashes.
Ava's dad going Fanboy at the regionals when he spots a Pikachu hat to get for himself.
His embarrassing defeat by Celestine is emphasized by him getting lost in imagination land by twirling his fingers around his head.
Ava's first match is against a kid who knows the feelings about feeling sick in their first regional event, because he himself puked. Cue a wide-eyed stare from him for several seconds before he comes back to.
When he's defeated, he wishes Ava good luck and takes his leave so he can puke.
Internationals
During the viral video that Joshua uploaded, it shows a shot of the three kids playing at Ava's house, except Celestine has an avocado face mask. She protests that Ava wasn't supposed to show that photo.
Ava's dad singing "Pokémon World" in the car ride to Internationals. All three kids are embarrassed, with Joshua and Celestine awkwardly staring out of the window while a mortified Ava buries her head in her hands. Cut to later in the drive... and they're all singing along.
Worlds
Ava's mom revealing very dramatically that she was a Pokémon TCG player, which is incredibly obvious to Ava due to her "ancient" Pokémon cards.
The flashback shows Ava's mom's downfall against a friendly-looking kid who suddenly becomes a full-blown villain with a Pikachu that mocks Ava's mom before defeating her, all in slow-mo.