In her debut episode, Toadette appears as Toad's love interest. Throughout the majority of the blooper, Toad tries desperately to win Toadette's affections but fails due to various reasons. She has a creepy and weird friend named Frankie who often interrupts and annoys Toad during his time to impress her.
Unfortunately, Toadette later reveals herself to be 9 years old to Toad and she was not interested with the whole love thing, causing a Policeman to appear out of nowhere and send Toad to jail for being a pervert to a young girl.
She makes a minor appearance pushing a baby stroller which is hijacked by Mario in an attempt to escape with a bystander's spaghetti. She is last seen in the episode running away screaming from Mario.
In one scene, Toadette tries to ask Toad out to the dance but Toad showed that he did not want to go, causing her to ask and later on, dance with Frankie instead.
She appears at Toad's intervention to help cure Toad of his addiction. She was later used as a body shield by Toadsworth.
Toadette appears again in Retarded64: Mario the Waiter having dinner with Toad. She asks Mario for a sugar-free chocolate cake and tells Mario to not screw it up.
While she doesn't make a physical appearance, she appears in the scary ride trap as Toad's worst nightmare, screaming "BUY ME MORE JEWELRY".
There is actually shown to be two Toadettes in this video, the first one is seen playing with Frankie until Mario and Sonic kill him by moving the slide to the edge of a building and Sonic turns the spinning equipment into a helicopter that goes all the way to space. The second Toadette is seen having a date with Toad until Toads says he needs to go to the bathroom.
As a prank on Toad, Mario gets out a Toad figurine and an anime figurine to make it look like Toad is cheating on her, resulting in the real Toad being shot by Toadette in a tank when he gets back. The first Toadette is seen again when Waluigi's elevator gets sent flying into space when it opens you can see her on the Merry-Go-Round in the background. The first one is seen again near the end still on the Merry-Go-Round in space saying "Somebody kill me".
Toadette returns in MARIO'S CHALLENGE, she is shown on Floor 5 as the first participant of the challenge where each participant must jump across from mushroom to mushroom to avoid falling into lava. However, the mushroom she jumped on was a trap, which in this case, smashed her into the ceiling.
Toadette appears with Toad, but Toad threw her through a window in the mall.
She appears in a flashback for the reason Toad was buying milk.
She appears as one of the third plane's passenger. However, Mario scares and kicks her out of her seat to take her place.
She appears in the ghettos of the Mushroom Kingdom where she witnessed Toad tipping Dr. Eggman who was being a stripper. Naturally, Toads runs away from her.
She appears as a passerby who Mario approached to sell his lemonade abet rudely, Naturally, she doesn't take it lightly and slaps him before leaving.
Toadette is unhinged and obsessive. She is overly attached to her boyfriend Toad and forces him to spend time with her or go to with her to certain events almost 24/7. She is also quite violent, as she can go into fits of rage over minor slights.
Earlier on, her personality varied in different episodes. In episodes like R64: the Toad, the Fat and the Ugly. she is depicted as a kid and is shown to be very nice and care about her friends. She also doesn't like love because she's nine.
However in other episodes in Retarded64: Mario The Waiter, she's shown to be somewhat bossy mainly towards Toad when he's acting rude. She's also depicted as being older as she's shown dating Toad or Frankie in the series.
Toad has repeatedly shown to be frightened of her and regards her as one of the banes of his existence. He does eventually stands up to her and throws her through a window in the 2018 Christmas Special.