NegaiShipping

NegaiShipping is the het ship between Ash Ketchum and Iris from the Pokémon fandom.

Canon
Iris blushes slightly upon meeting Ash, and throughout most of the episode. Later on, after Pikachu and Axew are stolen by Team Rocket, Ash jumps off a tree and falls down to the ground. Iris immediately jumps down from the tree, asking if Ash is all right, rather than trying to save the Pokémon. Iris also later thanks Ash for saving Axew, even though it was Oshawott who saved him. The morning after meeting Iris, Ash seems a little disappointed when she has suddenly gone missing. Iris then tells Ash that because of his actions she has started to change her view of him and she starts traveling with him.

During a rescue of some Pokémon, Ash loses his grip on a bridge made of Sandile, but Iris is there to grab his wrist, keeping hold of him as the Sandile righten themselves to safety. Afterward, the two look to each other and smile, having silently reconciled their differences. It is to be noted, however, they shared this look a moment later with the main Sandile; ultimately, it means, "A job well done."

During Ash's Gym battle with Cilan, Chili, and Cress, fans of the brothers stayed on one side of the arena to cheer on the Gym Leaders, while Iris stays on the opposing side and quite blatantly gazes at Ash with a look that could easily be interpreted as attraction or cool admiration (among others, both positive and negative, given she's been calling him a "kid" up until now, and not kindly).

Nearly to the final of Best Wishes, During Cilan going over the events that happened throughout the course of the episode, Iris kept getting angry at Ash or he kept getting angry at her for certain things and after Ash gave Iris a bitter apple she attempted to throw it back at him (although Cilan caught the apple before it hit Ash), and Iris angrily declared she and Ash weren't friends anymore and then she stormed off. When Iris noticed that Team Rocket had stolen Pikachu and Scraggy she freed them both and then she and Ash worked together to send Team Rocket "blasting off again". Iris and Ash made up and both gave each other gifts (she gave Ash an apple and he gave her flowers).

Fanon
Fans of this shipping consider that Ash should be with Iris because Ash wants to become a Pokémon Master and Iris wants to become a Dragon Master. Both are Pokémon Trainers. And they say that Iris is the strongest trainer of the pokégirls. Ash might feel hatred for Iris, but at least there are more feelings he showed more to her than to the others.

This shipping was popular along with Pokéshipping during the Best Wishes series (Pokémon anime), because Misty and Iris have similar personalities (Both of them are tsundere-like girls). However, with the arrival of the XY series of the Pokémon anime, this shipping drastically dropped in popularity. Actually most of Pokémon fans consider Negaishipping is the worst shipping due to Iris arguing a lot with Ash and calling him "You're a child" repeatedly.

It rivals with WhishfulShipping (CilanxIris) PokéShipping (Ash×Misty), AdvanceShipping (Ash×May), PearlShipping (Ash×Dawn), AlohaShipping (Ash×Mallow), AureliaShipping (Ash×Lillie), and BlueAngelShipping (Ash×Lana). The giant rival of this shipping is AmourShipping (Ash×Serena), because Iris has a totally opposite personality to Serena.