post two Anime characters who don't like each other but team up

Watanuki and Doumeki though much Mehr so for Watanuki primarily out of jealousy towards Doumeki over the affections of Himawari. But both Watanuki and Doumeki have help each other out from time to time in XXXHolic

i guess Uryu Minene and Yuno Gasai fit into this category

Kaoru Kaidoh and Takeshi Momoshiro from Prince of Tennis...Since they are rivals,they always fought/compete with each other whenever they paired up as a doubles team,but they always get over it Von working together...

Even though Sebastian and Claude (Black Butler) don't like each other they team up to rescue Ciel.

Mugen and Jin from Samurai Champloo really can't stand each other but they are kind of forced to team up together the whole Anime to go on a journey with Fuu to find the "Samurai who smells of Sunflowers."

Inuyasha and Koga! :D

Zoro & Sanji (One Piece)

Zoro & Sanji teaming up against foxy pirates for broggy ring game.......it was an epic battle when they team up if they put their mind they can be the best tag team.......he he he eh eh

Gintoki and Hijikata! two characters with the pretty much same interests but fight all the time XD

Gray and Lyon teamed up to fight Racer

Leorio and Tonpa from Hunter x hunter had to team up during the hunter exam, though they hated each other as Tonpa was the won who turned to come up after leorio, kurapika, gon and killua as they were a group of four and had to be one of five for that particular phase of the exam...
The whole time, they kept making one another realize that they hated each other..

Natsu and Grayyy ♥♥