When Ash said "I choose everybody", Butterfree didn't come out of its Poké Ball.
When Ash was turning around at the end of the episode, his backpack had its colors mixed.
Ash commenting that a bikini clad Misty "looks like a girl" after seeing her doesn't seem like something that the show would do.
Various Japanese Kana were not edited out like they usually are.
Brock calls Misty's Starmie a Staryu.