Soul Eater

In a world overrun by evil souls, a group of young warriors known as "Meisters" train at the prestigious Shibusen University to become skilled demon hunters. Armed with their unique partners, known as "Soul Eaters," the Meisters set out on a quests to collect the souls of 99 evil humans and one witch, a feat that will transform their weapons into formidable "Death Scythes." Alongside their companions Soul, Maka, Black Star, and Death the Kid, they face challenges and obstacles that test their strength, friendship, and determination to save the world from the impending doom.

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Some TV shows that have similar genres and were produced around the same time as Soul Eater include Rick and Morty, Sand Land: The Series, The Eminence in Shadow, Danny Phantom, Adventure Time: Fionna & Cake, Mega Man: Fully Charged.